ESSENTIAL_LECTURE_CAPM PART I

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学术英语(第二版)综合教师手册unit3

学术英语(第二版)综合教师手册unit3

Unit 3 Business EthicsI Teaching ObjectivesAfter learning Unit 3, students (Ss) are expected to develop the following academic skills and knowledge:II Teaching Activities and ResourcesReadingText ALead-inTeaching StepsAsk Ss to work in groups and complete the task in Lead-in. Then choose some groups to share their answers with the whole class.Answer Keys (Suggested Answers)1.Corporate Social Responsibility (CSR) can be defined as a self-regulatingbusiness model that helps a company be socially accountable —to itself, its stakeholders, and the public. In other words, it is the continuing commitment by business to behave ethically and contribute to economic development while improving the quality of life of the workforce and their families as well as of the local community and society at large.2.Text AnalysisTeaching Steps1.OverviewAsk Ss to preview Text A before class. Or, allocate some time for Ss to read the text quickly in class. Then invite several Ss to summarize the main idea of Text A.2.In-Depth Analysis1)Show Ss the following words and ask them to contribute to the class as muchas possible with what they know about these words. Provide additional information in Supplementary Information when necessary.•economic system•free enterprise2)Explain some important language points in Language Support to Ss.3)Discuss with Ss the features of the two versions of Adam Smith’s theory bydoing Task 1 in Critical reading and thinking.4)Organize a group discussion about the questions from Task 2 in Criticalreading and thinking. Encourage Ss to think independently, critically and creatively and share their ideas with each other.Supplementary Information1.economic systemAn economic system is a system for producing, distributing and consuming goods and services, including the combination of the various institutions, agencies, consumers, entities that comprise the economic structure of a given society or community. It also includes how these various agencies and institutions are linked to one another, how information goes between them, and the social relations within the system.Two of the basic and general economic systems are market economy and planned economy. Market economy is an economic system in which businesses and individuals decide what to produce and buy, and the market determines quantities sold and prices, whereas planned economy is an economic system in which decisions regarding production and investment are embodied in a plan formulated by a central authority, usually by a public body such as a government agency.Although a planned economy may be based on either centralized or decentralized forms of economic planning, it usually refers to a centrally planned economy.2.free enterpriseFree enterprise refers to the system of business in which individuals are free to decide what to produce, how to produce, and at what price to sell.Language Support1.Most academics today subscribe to the following modified version of AdamSmith’s theory:…(Para. 2)In the text, the phrase “subscribe to”means “agreeing with or supporting (an opinion, theory, etc.)”(同意;赞成).e.g. I subscribe to the idea that voting is my civic duty.She subscribes to the theory that some dinosaurs were warm-blooded andothers were cold-blooded.It can also refer to “paying money to get (a publication or service) regularly”(订阅).e.g. I subscribe to several magazines.We have subscribed to an evening newspaper.2.These constraints take a number of different forms. …Another set ofconstraints …(Para. 3)Two recent examples dramatically illustrate these points. First, …(Para. 3) Classification is employed to organize things into categories with a single organizing principle, and give examples of things that fit into each category. Here are other commonly-used words and expressions for classification:•The first (kind/type/group/class/etc.) …; the second …; the third …•sort, classify, categorize …•category, group, class, kind …3.Saving the financial system required a bailout of the banks and otherfinancial companies, and that bailout imposed huge costs on the taxpayers, and also helped push the economy into a deep recession. (Para. 5)impose sth. on sb.:i) force something on someone把......强加于e.g. He always imposes his opinion on others.ii) levy a tax or duty征税e.g. It is therefore necessary for governments to impose a higher tax on this kindof food.Here is another usage of the word “impose”:impose on sb.:i) force oneself on others强加于人e.g. Thanks for your offer to help, but I did not want to impose on you.ii) take unfair advantage of 利用e.g. Don’t you think you are imposing on your neighbor when you use histelephone for half an hour?4.be true to one’He is always true to his word and focused on the big picture.Ninety days later, true to his word, the goldsmith brought the crown.5.To date, Buffett has contributed more than $6 billion, and over time he isscheduled to contribute additional stock that is now worth in excess of $40 billion. (Para. 7)in excess of: greater than, more than 超过e.g. Luggage in excess of 100 kg will be charged extra.This plane can reach speeds in excess of 1000 kilometers an hour.Answer KeysCritical reading and thinkingTask 1 / Overview1The original version:The invisible hand; Profit maximization; Free enterprise systemThe modified version:the wealth of its stockholders; the best economic system; constraints2Argument 11) a wide range of regulations are imposed2) assessing costs on companies; BP oil spillArgument 21) behave ethically; value and reputation2) Don’t Be Evil3) creative capitalism4) contributed more than $6 billionTask 2 / Points for discussion (Suggested Answers)11) Yes, I agree. Because:• Earning profit is the main aim of every economic activity. A business is an economic activity and hence, its main aim should be to earn profit.• Profit is a measure of eff iciency and economic prosperity of the business. This justifies the concept of profit maximization.• Economic conditions do not remain the same all the time. A business can retain its profit so that it can survive the adverse situations in the future. Profit gives protection against future risks and uncertainties.• Profit is the main source of finance for growth and expansion. Profit is essential for the business in order to invest in new business propositions.• Profitability is essential for fulfilling the social goals of the business. With profit maximization a business can do socio-economic welfare and follow its policies of corporate social responsibility.2) No, I don’t agree. Because:Business should do anything they can to make a profit, but never at the cost of human welfare and natural environment. Human welfare must be considered as important as profit making. A business is successful to the extent that it provides a product that contributes to happiness in all forms. As a matter of fact, the great value of a business should be morally associated with consumer’s satisfaction and safety. On the other hand, businesses of great value should not be blind to their moral obligations of protecting the natural environment.2 Yes, it is a very effective way for society to impose such regulations to prevent companies from engaging in practices that hurt society. For most businesses their ultimate goal is to make profits. It is true that most businessmen try to abide by the laws while making profits. However we have to admit that there are some who use every means to make as much money as possible, even regardless of the interests ofemployees, communities, and environment. Therefore, the regulations such as penalties and suspension for internal rectification should be imposed to deter companies from unlawful practices.3 Yes, having a good reputation with customers, suppliers, employees and regulators is essential if value is to be maximized. Business success is associated with many entities, such as customers, suppliers, employees and regulators. If customers are satisfied with your products and service, they will be loyal to your company. If suppliers provide you with qualified products, your business will operate well. If employees are treated well, they will work very hard and are willing to be part of your company. If regulators are certain that your company acts fairly and follows rules, your company will develop sustainably. All above depends on whether the business is continually operating with society’s interests in mind and maintaining a good reputation.Language building-upAnswer keysTask 1 / Specialized vocabulary11 纳税人2 自由企业制度3 股东4 经济体制5 市场力量;市场调节作用6 金融机构7 stock price 8 mission9 corporate motto 10 assets11 profit maximization 12 financial system21 financial institutions2 free enterprise system3 assets4 Taxpayers5 stockholder6 profit maximization7 economic system 8 market forcesTask 2 / Academic vocabulary1. principal2. dramatically3. academics4. maximization5. framework6. range7. compensate 8. transfer9. inadequate 10. constraintsTask 3 / Collocations1. subscribe to2. striving to3. imposing …on4. go out of business5. as a whole6. engaged in7. go hand in hand with 8. in excess ofTask 4 / Formal English1 insights2 subscribe to3 imposes4 adverse5 mission6 philanthropic7 donated 8 famedTranslation of Text A达到适当的平衡在1776年,亚当·斯密描述了一只“看不见的手”是如何引导企业追求利润的,而这只手会引导企业做出有利于社会的决策。

第6讲 资本资产定价模型(CAPM) (《金融经济学》PPT课件)

第6讲  资本资产定价模型(CAPM) (《金融经济学》PPT课件)
第6讲 资本资产定价模型(CAPM)
6.1 从组合选择到市场均衡


融 经
市场组合M是什么样的?
济 学
市场组合就是包含了所有风险资产的整个市场

五 讲
这么个依赖于大量前提条件(各类资产的收益波动状况)的复杂均值方差优化
》 配
问题的结果M,怎么会这么巧就和现实中的整个市场一模一样?
套 课
但结果就是这么巧,也必须这么巧
对市场所做的简化假设
五 讲
没有交易成本(佣金、买卖价差等)

配 套
没有税收
课 件
所有资产都可以任意交易,并且无限可分
完全竞争:所有人都是价格的接受者,没有影响价格的能力
对投资者的假设(所有人都求解均值-方差问题)
所有人都以均值方差的方式选择投资组合:偏好更高的期望回报率,以及更低 的回报率波动率
i
市场组合M处,否则与CML
市场组合
定义矛盾
σ
0
7
6.4 CAPM的第二种论证
基于组合构建的CAPM论证(续)


融 经


由曲线与CML在M处相切得dE到(rw)
E(rM ) rf
二 五
d (rw ) w0
M
由求导法则及E(r )的表达式可知 讲





wdE(rw ) dE(rw ) d (rw ) dw
所有资产(包括无风险资产)都可以任意买空卖空
一致预期:所有人针对相同的时间区间(1期)考虑投资问题,并对资产的预期 回报率和预期波动率状况{E(r1̃ ), E(r2̃ ), ..., E(rñ ), σ(r1̃ ), σ(r2̃ ), ..., σ(rñ )}有相同预期

资本资产定价模型(CAPM(PPT44页)

资本资产定价模型(CAPM(PPT44页)

2. Mean-variance optimization with unlimited borrowing and lending at a risk-free rate
Sharpe ratio of H < Sharpe ratio of M
The combination of risk-free asset and M dominates the combination
Debt 8% 12%
Equity 13% 20%
When ρDE = -1,
wE
D D
E
1 wD
When ρDE = 0,
Bodie et al. (2014), Table 7.3, p. 211
Dr Ekaterina Svetlova
1. Brief revision: Lecture 2
Source: Bodie et al. 2014: p. 220
Dr Ekaterina Svetlova
1. Brief revision: Lecture 2
Diversifiable (non systematic) risk vs undiversifiable (systematic) risk
We construct risky portfolios varying xD and xE
to provide the lowest possible risk for any given level of expected return
E(rp) = wD E(rD) + wEE(rE)
2 p
of risk-free asset and H
Source: Perold 2004

新世纪英语专业本科生综合教程unit3 教师上课用 课文详解 词汇解释

新世纪英语专业本科生综合教程unit3 教师上课用 课文详解 词汇解释

about taking the entire social experience of college and putting it online. Eduardo: I can’t feel my legs. Mark: I know. I’m totally psyched about this, too. But, Wardo? Eduardo: Yeah? Eduardo: (recalling): “It would be exclusive.” Mark: You would have to know the people on the site to get past your own page, like getting punched. Now, that’s good. Mark: Wardo, it’s like a final club, except we’re the president.
Eduardo: Yeah. Mark: But it wasn’t because they saw pictures of hot
girls. You can go anywhere on the Internet and see pictures of hot girls. Eduardo: Yeah. Mark: That’s because they saw pictures of girls they knew. People want to go on the Internet and check out their friends, so why not build a website that offers that? Friends, pictures, profiles, whatever you can visit, browse around. Maybe it’s someone you just met at a party. But I’m not talking about a dating site. I’m talking

Mata手册说明书

Mata手册说明书

Contents[M-0]Introduction to the Mata manualintro.................................................Introduction to the Mata manual[M-1]Introduction and adviceintro........................................................Introduction and advice ing Mata with ado-files first....................................................Introduction andfirst session help........................................................Obtaining help in Stata how.............................................................How Mata works ing Mata interactively LAPACK.........................................The LAPACK linear-algebra routines limits..................................................Limits and memory utilization naming......................................Advice on naming functions and variables permutation................................An aside on permutation matrices and vectors returnedargs..................................Function arguments used to return results source.....................................................Viewing the source code e and specification of tolerances[M-2]Language definitionnguage definition break..............................................Break out of for,while,or do loop class...........................................Object-oriented programming(classes) ments continue...........................Continue with next iteration of for,while,or do loop declarations...................................................Declarations and types do..............................................................do...while(exp) errors.................................................................Error codes exp..................................................................Expressions for......................................................for(exp1;exp2;exp3)stmt ftof...................................................Passing functions to functions goto...................................................................goto label if.............................................................if(exp)...else... op arith........................................................Arithmetic operators op assignment..................................................Assignment operator op colon...........................................................Colon operators op conditional..................................................Conditional operator op increment.......................................Increment and decrement operators op join..............................................Row-and column-join operators op kronecker........................................Kronecker direct-product operator op logical........................................................Logical operators op range..........................................................Range operators op transpose.............................................Conjugate transpose operator12Contents optargs.........................................................Optional arguments pointers..................................................................Pointers pragma...............................................Suppressing warning messages reswords...........................................................Reserved words return........................................................return and return(exp) e of semicolons struct..................................................................Structures e of subscripts syntax............................................Mata language grammar and syntax version............................................................Version control void................................................................V oid matrices while.............................................................while(exp)stmt[M-3]Commands for controlling Matamands for controlling Mata end...................................................Exit Mata and return to Stata mata.....................................................Mata invocation command mata clear.....................................................Clear Mata’s memory mata describe.....................................Describe contents of Mata’s memory mata drop...................................................Drop matrix or function mata help......................................................Obtain help in Stata mata matsave..............................................Save and restore matrices mata memory.........................................Report on Mata’s memory usage mata mlib....................................................Create function library mata mosave................................Save function’s compiled code in objectfile mata rename..............................................Rename matrix or function mata set......................................Set and display Mata system parameters mata stata...................................................Execute Stata command mata which........................................................Identify function namelists........................................Specifying matrix and function names [M-4]Index and guide to functions intro....................................................Index and guide to functions io...................................................................I/O functions manipulation....................................................Matrix manipulation mathematical.........................................Important mathematical functions matrix............................................................Matrix functions programming................................................Programming functions scalar..................................................Scalar mathematical functions solvers................................Functions to solve AX=B and to obtain A inverse standard..........................................Functions to create standard matrices stata........................................................Stata interface functions statistical........................................................Statistical functions string..................................................String manipulation functions utility.......................................................Matrix utility functions [M-5]Mata functions intro...............................................................Mata functionsContents3 abbrev().........................................................Abbreviate strings abs().......................................................Absolute value(length) adosubdir().........................................Determine ado-subdirectory forfile all()..........................................................Element comparisons args()........................................................Number of arguments asarray().........................................................Associative arrays ascii().....................................................Manipulate ASCII codes assert().....................................................Abort execution if false blockdiag()...................................................Block-diagonal matrix bufio()........................................................Buffered(binary)I/O byteorder().............................................Byte order used by computer C()...............................................................Make complex c()...............................................................Access c()value callersversion()........................................Obtain version number of caller cat()....................................................Loadfile into string matrix chdir().......................................................Manipulate directories cholesky().........................................Cholesky square-root decomposition cholinv()...................................Symmetric,positive-definite matrix inversion cholsolve()............................Solve AX=B for X using Cholesky decomposition comb()binatorial function cond()...........................................................Condition number conj()plex conjugate corr()....................................Make correlation matrix from variance matrix cross().............................................................Cross products crossdev()..................................................Deviation cross products cvpermute().................................................Obtain all permutations date()...................................................Date and time manipulation deriv()........................................................Numerical derivatives designmatrix().....................................................Design matrices det()........................................................Determinant of matrix diag().................................................Replace diagonal of a matrix diag().......................................................Create diagonal matrix diag0cnt()..................................................Count zeros on diagonal diagonal().........................................Extract diagonal into column vector dir()....................................................................File list direxists()..................................................Whether directory exists direxternal().....................................Obtain list of existing external globals display().............................................Display text interpreting SMCL displayas()........................................................Set display level displayflush()............................................Flush terminal-output buffer Dmatrix().......................................................Duplication matrix docx*().......................................Generate Office Open XML(.docx)file dsign()............................................FORTRAN-like DSIGN()function e()...................................................................Unit vectors editmissing()..........................................Edit matrix for missing values edittoint()......................................Edit matrix for roundoff error(integers) edittozero().......................................Edit matrix for roundoff error(zeros) editvalue()............................................Edit(change)values in matrix eigensystem()............................................Eigenvectors and eigenvalues4Contentseigensystemselect()pute selected eigenvectors and eigenvalues eltype()..................................Element type and organizational type of object epsilon().......................................Unit roundoff error(machine precision) equilrc()..............................................Row and column equilibration error().........................................................Issue error message errprintf()..................................Format output and display as error message exit()..........................................................Terminate execution exp().................................................Exponentiation and logarithms factorial()..............................................Factorial and gamma function favorspeed()...................................Whether speed or space is to be favored ferrortext()......................................Text and return code offile error code fft().............................................................Fourier transform fileexists().......................................................Whetherfile exists fillmissing()..........................................Fill matrix with missing values findexternal().................................Find,create,and remove external globals findfile().................................................................Findfile floatround().................................................Round tofloat precision fmtwidth().........................................................Width of%fmt fopen()..................................................................File I/O fullsvd()............................................Full singular value decomposition geigensystem().................................Generalized eigenvectors and eigenvalues ghessenbergd()..................................Generalized Hessenberg decomposition ghk()...................Geweke–Hajivassiliou–Keane(GHK)multivariate normal simulator ghkfast().....................GHK multivariate normal simulator using pregenerated points gschurd()...........................................Generalized Schur decomposition halton().........................................Generate a Halton or Hammersley set hash1()...........................................Jenkins’one-at-a-time hash function hessenbergd()..............................................Hessenberg decomposition Hilbert()..........................................................Hilbert matrices I()................................................................Identity matrix inbase()...........................................................Base conversion indexnot()..................................................Find character not in list invorder()............................................Permutation vector manipulation invsym().............................................Symmetric real matrix inversion invtokens()...............................Concatenate string rowvector into string scalar isdiagonal()..............................................Whether matrix is diagonal isfleeting()...........................................Whether argument is temporary isreal()......................................................Storage type of matrix isrealvalues()..................................Whether matrix contains only real values issymmetric().................................Whether matrix is symmetric(Hermitian) isview()....................................................Whether matrix is view J().............................................................Matrix of constants Kmatrix()mutation matrix lapack()PACK linear-algebra functions liststruct()...................................................List structure’s contents Lmatrix().......................................................Elimination matrix logit()...........................................Log odds and complementary log-logContents5 lowertriangle().........................................Extract lower or upper triangle lud()...........................................................LU decomposition luinv()......................................................Square matrix inversion lusolve()...................................Solve AX=B for X using LU decomposition makesymmetric().............................Make square matrix symmetric(Hermitian) matexpsym().......................Exponentiation and logarithms of symmetric matrices matpowersym().........................................Powers of a symmetric matrix mean()............................................Means,variances,and correlations mindouble().................................Minimum and maximum nonmissing value minindex().......................................Indices of minimums and maximums minmax().................................................Minimums and maximums missing().......................................Count missing and nonmissing values missingof()................................................Appropriate missing value mod()..................................................................Modulus moptimize().....................................................Model optimization more().....................................................Create–more–condition negate().......................................................Negate real matrix norm()....................................................Matrix and vector norms normal()................................Cumulatives,reverse cumulatives,and densities optimize().....................................................Function optimization panelsetup()...................................................Panel-data processing pathjoin()....................................................File path manipulation pinv().................................................Moore–Penrose pseudoinverse polyeval()........................................Manipulate and evaluate polynomials printf().............................................................Format output qrd()...........................................................QR decomposition qrinv().............................Generalized inverse of matrix via QR decomposition qrsolve()...................................Solve AX=B for X using QR decomposition quadcross().............................................Quad-precision cross products range()..................................................Vector over specified range rank().............................................................Rank of matrix Re()..................................................Extract real or imaginary part reldif()..................................................Relative/absolute difference rows()........................................Number of rows and number of columns rowshape().........................................................Reshape matrix runiform()..............................Uniform and nonuniform pseudorandom variates runningsum().................................................Running sum of vector schurd()......................................................Schur decomposition select()..............................................Select rows,columns,or indices setbreakintr()..................................................Break-key processing sign()...........................................Sign and complex quadrant functions sin()..........................................Trigonometric and hyperbolic functions sizeof().........................................Number of bytes consumed by object solve tol().....................................Tolerance used by solvers and inverters solvelower()..........................................Solve AX=B for X,A triangular solvenl().........................................Solve systems of nonlinear equations sort().......................................................Reorder rows of matrix6Contentssoundex().............................................Convert string to soundex code spline3()..................................................Cubic spline interpolation sqrt().................................................................Square root st addobs()....................................Add observations to current Stata dataset st addvar().......................................Add variable to current Stata dataset st data()...........................................Load copy of current Stata dataset st dir()..................................................Obtain list of Stata objects st dropvar()...........................................Drop variables or observations st global()........................Obtain strings from and put strings into global macros st isfmt()......................................................Whether valid%fmt st isname()................................................Whether valid Stata name st local()..........................Obtain strings from and put strings into Stata macros st macroexpand().......................................Expand Stata macros in string st matrix().............................................Obtain and put Stata matrices st numscalar().......................Obtain values from and put values into Stata scalars st nvar()........................................Numbers of variables and observations st rclear().....................................................Clear r(),e(),or s() st store().................................Modify values stored in current Stata dataset st subview()..................................................Make view from view st tempname()...............................................Temporary Stata names st tsrevar().....................................Create time-series op.varname variables st updata()....................................Determine or set data-have-changedflag st varformat().................................Obtain/set format,etc.,of Stata variable st varindex()...............................Obtain variable indices from variable names st varname()...............................Obtain variable names from variable indices st varrename()................................................Rename Stata variable st vartype()............................................Storage type of Stata variable st view()..........................Make matrix that is a view onto current Stata dataset st viewvars().......................................Variables and observations of view st vlexists()e and manipulate value labels stata()......................................................Execute Stata command stataversion().............................................Version of Stata being used strdup()..........................................................String duplication strlen()...........................................................Length of string strmatch()....................................Determine whether string matches pattern strofreal().....................................................Convert real to string strpos().....................................................Find substring in string strreverse()..........................................................Reverse string strtoname()...........................................Convert a string to a Stata name strtoreal().....................................................Convert string to real strtrim()...........................................................Remove blanks strupper()......................................Convert string to uppercase(lowercase) subinstr()...........................................................Substitute text sublowertriangle()...........................Return a matrix with zeros above a diagonal substr()......................................................Substitute into string substr()...........................................................Extract substring sum().....................................................................Sums svd()..................................................Singular value decomposition svsolve()..........................Solve AX=B for X using singular value decomposition swap()..............................................Interchange contents of variablesContents7 Toeplitz().........................................................Toeplitz matrices tokenget()........................................................Advanced parsing tokens()..................................................Obtain tokens from string trace().......................................................Trace of square matrix transpose()..................................................Transposition in place transposeonly().......................................Transposition without conjugation trunc()............................................................Round to integeruniqrows()..............................................Obtain sorted,unique values unitcircle()plex vector containing unit circle unlink().................................................................Erasefile valofexternal().........................................Obtain value of external global Vandermonde()................................................Vandermonde matrices vec().........................................................Stack matrix columns xl()............................................................Excelfile I/O class[M-6]Mata glossary of common terms Glossary........................................................................ Subject and author index...........................................................。

学术综合英语罗立胜听力原文

学术综合英语罗立胜听力原文

学术综合英语罗立胜听力原文Title: The Importance of Academic English in Higher EducationAs a university professor of English, I cannot stress enough the significance of academic English in higher education. Academic English refers to the specific style, tone, and vocabulary used in academic settings such as research papers, scholarly journals, and conference presentations. It is a form of communication that allows scholars to share their ideas and research with their peers in a clear, concise and coherent manner.Academic English is a critical skill that students need to develop to excel in their academic pursuits. It is essential for students to learn to write and speak in academic English as it enables them to communicate effectively and participate fully in their courses. They also need to be able to read academic texts and understand complex ideas.Without a good command of academic English, students may struggle to write research papers, read and understand their course materials, and participate fully in class discussions. They may also find it challenging to communicate effectively with their professorsand peers.In today's globalized world, academic English is becoming more critical as scholars strive to share their research with audiences from different countries and backgrounds. A lack of proficiency in academic English can limit opportunities for students and researchers to engage in international conferences, publish in international journals, and collaborate with scholars from different parts of the world.In conclusion, the importance of academic English in higher education cannot be overstated. It is an essential skill for students and scholars to communicate effectively, participate fully in academic life, and succeed in their academic pursuits. Students should be encouraged to develop their academic English skills from an early stage, and universities should provide adequate resources and support to help students improve their proficiency in academic English.。

2024年1月浙江省首考普通高等学校招生全国统一考试英语试题

2024年1月浙江省首考普通高等学校招生全国统一考试英语试题

2024年1月浙江省首考普通高等学校招生全国统一考试英语试题一、阅读理解Tom Sawyer Play Is an AdventureA 35-minute hand-clapping, foot-stomping musical version of a Mark Twain favorite returns with this Tall Stacks festival.“Tom Sawyer: A River Adventure” has all the good stuff, including the fence painting, the graveyard, the island and the cave. It is adapted by Joe McDonough, with music by David Kisor. That’s the local stage writing team that creates many of the Children’s Theatre of Cincinnati’s original musicals, along with the holiday family musicals at Ensemble Theatre.This year Nathan Turner of Burlington is Tom Sawyer, and Robbie McMath of Fort Mitchell is Huck Finn.Tumer, a 10th-grader at School for Creative and Performing Arts, is a familiar presence on Cincinnati’s stages. He is a star act or of Children’s Theatre, having played leading roles in “The Legend of Sleepy Hollow” and “The Wizard of Oz,” and is fresh from Jersey Production “Ragtime”.McMath is a junior at Beechwood High School. He was in the cast of “Tom Sawyer” when it was first performed and is a Children’s Theatre regular, with five shows to his credit. This summer he attended Kentucky’s Governor’s School for the Arts in Musical Theatre.Note to teachers: Children’s Theatre has a study guide demonstrating how math and science can be taught through “Tom Sawyer.” For downloadable lessons, visit the official website of Children’s Theatre.1.Who wrote the music for “Tom Sawyer: A River Adventure”?A.David Kisor.B.Joe McDonough.C.Nathan Turner.D.Robbie McMath.2.What can we learn about the two actors?A.They study in the same school.B.They worked together in ”Ragtime“.C.They are experienced on stage.D.They became friends ten years ago.3.What does Children’s Theatre provide for teachers?A.Research funding.B.Training opportunities.C.Technical support.D.Educational resources.【答案】1.A 2.C 3.D【解析】1.根据第二段中的“It is adapted by Joe McDonough, with music by David Kisor.(本剧由乔·麦克多诺改编,大卫·基索作曲。

[FRM考点解析]CAPM知识点的详细讲解

[FRM考点解析]CAPM知识点的详细讲解

[FRM考点解析]CAPM知识点的详细讲解对于参加FRM考试的考生而言,CAPM这个词一定是非常熟悉的,但你是否真正的弄懂了CAPM的知识点呢?今天就让高顿FRM研究培训院的Anthony 老师给大家详细讲解一下CAMP的相关知识点。

CAPM(capital asset pricing model)是建立在马科威茨模型基础上的,马科威茨模型的假设自然包含在其中:1、投资者希望财富越多愈好,效用是财富的函数,财富又是投资收益率的函数,因此可以认为效用为收益率的函数。

2、投资者能事先知道投资收益率的概率分布为正态分布。

3、投资风险用投资收益率的方差或标准差标识。

4、影响投资决策的主要因素为期望收益率和风险两项。

5、投资者都遵守主宰原则(Dominance rule),即同一风险水平下,选择收益率较高的证券;同一收益率水平下,选择风险较低的证券。

CAPM的附加假设条件:1、可以在无风险折现率R的水平下无限制地借入或贷出资金。

2、所有投资者对证券收益率概率分布的看法一致,因此市场上的效率边界只有一条。

3、所有投资者具有相同的投资期限,而且只有一期。

4、所有的证券投资可以无限制的细分,在任何一个投资组合里可以含有非整数股份。

5、税收和交易费用可以忽略不计。

6、所有投资者可以及时免费获得充分的市场信息。

7、不存在通货膨胀,且折现率不变。

8、投资者具有相同预期,即他们对预期收益率、标准差和证券之间的协方差具有相同的预期值。

上述假设表明:第一,投资者是理性的,而且严格按照马科威茨模型的规则进行多样化的投资,并将从有效边界的某处选择投资组合;第二,资本市场是完全有效的市场,没有任何磨擦阻碍投资。

CAPM的核心假设是将证券市场中所有投资人视为看出初始偏好外都相同的个人,并且资本资产定价模型是在Markowitz均值——方差模型的基础上发展而来,它还继承了证券组合理论的假设。

CAPM核心假设具体有以下几点:证券市场是有效的,即信息完全对称;无风险证券存在,投资者可以自由地按无风险利率借入或贷出资本;投资总风险可以用方差或标准差表示,系统风险可用β系数表示。

资本资产定价模型实证检验-R

资本资产定价模型实证检验-R

一些早期的实证检验
• 大多数早期检验都使用一个时间序列(首次)回归估计贝塔,然后使 用一个横截面(二次)回归检验CAPM模型中推出的假设。 • 林特纳做出的CAPM的实证研究: 首先对样本中的301只普通股票分别计算贝塔,方法是:用每只股票 的年收益率对样本中所有股票的平均收益率进行回归,使用数据时间 段是1954-1963年,接着进行二次截面回归。 结果显示与CAPM模型相违背。
ft p 存在线性关系。 (3) pt (4)β p 的回归系数 γ 1应等于 Rmf R ft
R R 与β
γ 1 >0,因为市场投资组合也是风险资产,总体上其报酬应大于无风险 资产报酬。
资本资产定价模型的检验
• 在这个模型背后的三个建设: (1)市场模型在每期都成立 (2)CAPM在每期都成立 (3)贝塔随时间变化是稳定的。 用事后数据来检验这一模型,实际上就是同时检验这三个假设。
资本资产定价模型Ⅱ
• 资本资产定价模型(CAPM)是指一种资产预期报酬是 其与市场投资组合报酬间协方差的线性函数。
E Ri R f β E Rm R f

f • 为无风险的报酬, Rm 为市场投资组合的报酬。 • 套利定价模型(Ross,1976),指任何风险性资产的报酬 是影响资产报酬各种共同因素的线性组合,套利定价模 型(APT)较CAPM更一般,因它包括更多的因素。
R
资本资产定价模型的检验
• 对CAPM进行检验时,有学者疑问模型能否很好地拟合数 据。 • 由于 E R 是预期报酬,而预期是不能观测的,因此,需 将预期的形式转换成可以用观测数据检验的形式,这可通 过假设总体上一种资产的报酬等于预期报酬 E R 。 • 这就提出一个问题,如何证明可以用实现值来检验期望模 型? • 有两类辩护理由:简单辩护认为期望值平均来说是正确的 实际值可以作为期望值的替代。 复杂辩护假设证券收益与一个市场组合的收益线性相关。 这个模型称为市场模型。

Investmet lecture_1_CAPM

Investmet lecture_1_CAPM

correlation
The lower the correlation, the lower the volatility we can obtain
As the correlation decreases, the volatility of the portfolio falls.
The curve showing the portfolios will bend to the left to a greater
There are different ways to diversify
By having different stocks in the portfolio, or By having the same stocks in the portfolio, but invest different amounts in each stock
统性风险才能被补偿 efficient frontier
Why E[Rm]- Rf is the price of risk? The market portfolio 被看作是
Class Outline
What is the best way to form a portfolio?
Diversification would reduce the risk of a portfolio
The return on the portfolio, Rp , is the weighted average of the returns on the
RP x1R1 x2 R2 xn Rn i xi Ri The expected return of a portfolio is the weighted average of the expected returns of the investments within it

05 CAPM_a

05 CAPM_a

Slide 05-1
Eco 525: Financial Economics I
Overview
• Simple CAPM with quadratic utility functions
(derived from state-price beta model)
• Mean-variance preferences
The Efficient Frontier: One Risk Free and n Risky Assets
16:14 Lecture 05 Mean-Variance Analysis and CAPM Slide 05-14
Eco 525: Financial Economics I
Mean-Variance Preferences
h μp := E [rp ] = wj μj , where each μj = P
j j
hj
2 σp := V ar [rp ]
= = =
w 0 V w = (w1 w2 )
2 + w2 σ21 ( w 1 σ1
µ
2 σ1
σ21
σ12 2 σ2
¶µ
2 w1 σ12 + w2 σ2 )
2 2 2 2 w1 σ1 + w 2 σ2 + 2w1 w2 σ12 ≤ 0
16:14 Lecture 05 Mean-Variance Analysis and CAPM Slide 05-5
Eco 525: Financial Economics I
Overview
• Simple CAPM with quadratic utility functions

15-11-0189-00-004i-suggested-resolution-security-comments-on-802-15-4i-draft-d04-text-spec-companion

15-11-0189-00-004i-suggested-resolution-security-comments-on-802-15-4i-draft-d04-text-spec-companion

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253547. Security suite7.1 OverviewThe MAC sublayer is responsible for providing security services on specified incoming and outgoing frames when requested to do so by the higher layers. This standard supports the following security services:—Data confidentiality —Data authenticity —Replay protection7.2 Functional descriptionA device may optionally implement security. A device that does not implement security shall not provide a mechanism for the MAC sublayer to perform any cryptographic transformation on incoming and outgoing frames nor require any PIB attributes associated with security. A device that implements security shall provide a mechanism for the MAC sublayer to provide cryptographic transformations on incoming and outgoing frames using information in the PIB attributes associated with security when the macSecurityEnabled attribute is set to TRUE.If the MAC sublayer is required to transmit a frame or receives an incoming frame, the MAC sublayer shall process the frame as specified in 7.2.1 and 7.2.3, respectively.7.2.1 Outgoing frame security procedureThe inputs to this procedure are the frame to be secured and the SecurityLevel, KeyIdMode, KeySource, and KeyIndex parameters from the originating primitive or automatic request PIB attributes. The outputs from this procedure are the status of the procedure and, if this status is SUCCESS, the secured frame.The outgoing frame security procedure involves the following steps as applicable:a)If the Security Enabled field of the Frame Control field of the frame to be secured is set to zero, the procedure shall set the security level to zero.b)If the Security Enabled field of the Frame Control field of the frame to be secured is set to one, the procedure shall set the security level to the SecurityLevel parameter. If the resulting security level is zero, the procedure shall return with a status of UNSUPPORTED_SECURITY.c)If the macSecurityEnabled attribute is set to FALSE and the security level is not equal to zero, the procedure shall return with a status of UNSUPPORTED_SECURITY.d)The procedure shall determine whether the frame to be secured satisfies the constraint on the maxi-mum length of MAC frames, as follows:1)The procedure shall set the length M , in octets, of the Authentication field to zero if the security level is equal to zero and shall determine this value from the security level and Table 56 other-wise.2)The procedure shall determine the length AuxLen, in octets, of the auxiliary security header, as described in 7.4, using KeyIdMode and the security level.3)The procedure shall determine the data expansion as AuxLen + M .4)The procedure shall check whether the length of the frame to be secured, including data expan-sion and FCS, is less than or equal to aMaxPHYPacketSize . If this check fails, the procedure shall return with a status of FRAME_TOO_LONG.1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54e)If the security level is zero, the procedure shall set the secured frame to be the frame to be securedand return with a status of SUCCESS.f)The procedure shall set the frame counter to the macFrameCounter attribute. If the frame counterhas the value 0xffffffff, the procedure shall return with a status of COUNTER_ERROR.g)The procedure shall obtain the KeyDescriptor using the outgoing frame key retrieval procedure asdescribed in 7.2.2. If that procedure fails, the procedure shall return with a status of UNAVAILABLE_KEY.h)If the Blacklisted element of the KeyDescriptor is set to TRUE, the procedure shall return with a sta-tus of KEY_ERROR.i)The procedure shall insert the auxiliary security header into the frame, with fields set as follows:1)The Security Level field of the Security Control field shall be set to the security level.2)The Key Identifier Mode field of the Security Control field shall be set to the KeyIdModeparameter.3)The Frame Counter field shall be set to the frame counter.4)If the KeyIdMode parameter is set to a value not equal to zero, the Key Source and Key Indexfields of the Key Identifier field shall be set to the KeySource and KeyIndex parameters,respectively.j)The procedure shall then use macExtendedAddress, the frame counter, the security level, and the Key element of the KeyDescriptor to produce the secured frame according to the transformation process known as CCM* [or the extension of CCM, which is the combined counter with CBC-MAC(i.e., cipher block chaining message authentication code) mode of operation] that is described in thesecurity operations, as described in 7.3.4.1)If the SecurityLevel parameter specifies the use of encryption, as defined in Table56, theencryption operation shall be applied only to the actual payload field within the MAC payload,i.e., the Beacon Payload field as described in 5.2.2.1.8, Command Payload field, as described in5.2.2.4.3, or Data Payload field, as described in 5.2.2.2.2, depending on the frame type. Thecorresponding payload field is passed to the CCM* transformation process described in 7.3.4as the unsecured payload, as defined in Table53. The resulting encrypted payload shall substi-tute the original payload.2)The remaining fields in the MAC payload part of the frame shall be passed to the CCM* trans-formation process described in 7.3.4 as the nonpayload fields, as defined in Table53.3)The ordering and exact manner of performing the encryption and integrity operations and theplacement of the resulting encrypted data or integrity code within the MAC Payload field shallbe as defined in 7.3.4.k)The procedure shall increment the frame counter by one and set the macFrameCounter attribute to the resulting value.l)If the macFrameCounter element is equal to 0xffffffff, the procedure shall set the Blacklisted ele-ment of the KeyDescriptor to TRUE.m)The procedure shall return with the secured frame and a status of SUCCESS.7.2.2 Outgoing frame key retrieval procedureThe inputs to this procedure are the frame to be secured and the KeyIdMode, KeySource, and KeyIndex parameters from the originating primitive. The outputs from this procedure are a passed or failed status and, if passed, a KeyDescriptor.The outgoing frame key retrieval procedure involves the following steps as applicable:a)If the KeyIdMode parameter is set to 0x00 (implicit key identification), the procedure shall deter-mine the key lookup data and key lookup size as follows:1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253541)If the Destination Addressing Mode field of the Frame Control field of the frame is set to 0x00and the macPANCoordShortAddress attribute is set to a value in the range 0x0000–0xfffd (i.e.,the short address is used), the key lookup data shall be set to the Source PAN Identifier field of the frame right-concatenated, as defined in B.2.1, with the macPANCoordShortAddress attribute. The key lookup size shall be set to four.2)If the Destination Addressing Mode field of the Frame Control field of the frame is set to 0x00and the macPANCoordShortAddress attribute is set to 0xfffe (i.e., the extended address is used), the key lookup data shall be set to the macPANCoordExtendedAddress attribute. The key lookup size shall be set to eight.3)If the Destination Addressing Mode field of the Frame Control field of the frame is set to 0x02,the key lookup data shall be set to the Destination PAN Identifier field of the frame right-con-catenated, as defined in B.2.1, with the Destination Address field of the frame. The key lookup size shall be set to four.4)If the Destination Addressing Mode field of the Frame Control field of the frame is set to 0x03,the key lookup data shall be set to the Destination Address field of the frame. The key lookup size shall be set to eight.The key index shall be set to the single octet 0x00.b)If the KeyIdMode parameter is set to a value not equal to 0x00 (explicit key identification), the pro-cedure shall determine the key lookup data and key lookup size as follows:1)If the KeyIdMode parameter is set to 0x01, the key lookup data shall be set to the macDefault-KeySource attribute. The key lookup size shall be set to eight.2)If the KeyIdMode parameter is set to 0x02, the key lookup data shall be set to the KeySource parameter. The key lookup size shall be set to four.3)If the KeyIdMode parameter is set to 0x03, the key lookup data shall be set to the KeySource parameter. The key lookup size shall be set to eight.The key index shall be set to the KeyIndex parameter.c)The procedure shall obtain the KeySourceDescriptor by passing the key lookup data and the key lookup size to the KeySourceDescriptor lookup procedure as described in 7.2.8. If that procedure returns with a failed status, this procedure shall also return with a failed status.d)The procedure shall obtain the KeyDescriptor by passing the KeySourceDescriptor and the key index to the KeyDescriptor lookup procedure as described in 7.2.6. If that procedure returns with a failed status, this procedure shall also return with a failed status.e)The procedure shall return with a passed status, having obtained the KeyDescriptor.NOTE—For broadcast frames, the outgoing frame key retrieval procedure will result in a failed status if implicit key identification is used. Hence, explicit key identification should be used for broadcast frames.57.2.3 Incoming frame security procedureThe input to this procedure is the frame to be unsecured. The outputs from this procedure are the unsecured frame, the security level, the key identifier mode, the key source, the key index, and the status of the procedure.All outputs of this procedure are assumed to be invalid unless and until explicitly set in this procedure.5Notes in text, tables, and figures are given for information only and do not contain requirements needed to implement the standard.1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54It is assumed that the PIB attributes associating KeyDescriptors in macKeyTable with a single, unique device or a number of devices will have been established by the next higher layer.The incoming frame security procedure involves the following steps:a)If the Security Enabled field of the Frame Control field of the frame to be unsecured is set to zero,the procedure shall set the security level to zero.b)If the Security Enabled field of the Frame Control field of the frame to be unsecured is set to one andthe frame version number of the Frame Control field of the frame to be unsecured is set to zero, the procedure shall set the unsecured frame to be the frame to be unsecured and return with a status of UNSUPPORTED_LEGACY.c)If the Security Enabled field of the Frame Control field of the frame to be unsecured is set to one, theprocedure shall set the security level and the key identifier mode to the corresponding fields of the Security Control field of the auxiliary security header of the frame to be unsecured, and the key source and key index to the corresponding fields of the Key Identifier field of the auxiliary security header of the frame to be unsecured, if present. If the resulting security level is zero, the procedure shall set the unsecured frame to be the frame to be unsecured and return with a status of UNSUPPORTED_SECURITY.d)If the macSecurityEnabled attribute is set to FALSE, the procedure shall set the unsecured frame tobe the frame to be unsecured and return with a status of SUCCESS if the security level is equal to zero and with a status of UNSUPPORTED_SECURITY otherwise.e)The procedure shall obtain the SecurityLevelDescriptor by passing the frame type and, dependingon whether the frame is a MAC command frame, the first octet of the MAC payload (i.e., command frame identifier for a MAC command frame) to the SecurityLevelDescriptor lookup procedure described in 7.2.12. If that procedure fails, the procedure shall set the unsecured frame to be the frame to be unsecured and return with a status of UNA V AILABLE_SECURITY_LEVEL.f)The procedure shall determine whether the frame to be unsecured conforms to the security level pol-icy by passing the SecurityLevelDescriptor and the security level to the incoming security level checking procedure, as described in 7.2.13. If that procedure returns with a failed status, the proce-dure shall set the unsecured frame to be the frame to be unsecured and return with a status of IMPROPER_SECURITY_LEVEL; otherwise, if that procedure returns with a passed status and the security level is equal to zero, the procedure shall set the unsecured frame to be the frame to be unse-cured and return with a status of SUCCESS.g)The procedure shall obtain the DeviceDescriptor using the incoming frame device retrieval proce-dure described in 7.2.6. If that procedure fails, the procedure shall set the unsecured frame to be the frame to be unsecured and return with a status of UNA V AILABLE_DEVICE.h)If the incoming security level checking procedure of Step f had as output the ‘conditionally passed’status, the procedure shall set the unsecured frame to be the frame to be unsecured and return with the unsecured frame, the security level, the key identifier mode, the key source, the key index, and a status of SUCCESS, if the Exempt element of the DeviceDescriptor is set to TRUE, and with a sta-tus of IMPROPER_SECURITY_LEVEL otherwise.i)The procedure shall obtain the KeyDescriptor using the incoming frame key retrieval proceduredescribed in 7.2.4. If that procedure fails, the procedure shall set the unsecured frame to be the frame to be unsecured and return with a status of UNA V AILABLE_KEY.j)The procedure shall obtain the KeyDeviceDescriptor using the KeyDeviceDescriptor lookup proce-dure described in 7.2.8. If that procedure fails or if the Blacklisted element of the KeyDeviceDe-scriptor is set to TRUE, the procedure shall set the unsecured frame to be the frame to be unsecured and return with a status of KEY_ERROR.k)The procedure shall determine whether the frame to be unsecured conforms to the key usage policy by passing the KeyDescriptor, the frame type, and, depending on whether the frame is a MAC com-mand frame, the first octet of the MAC payload (i.e., command frame identifier for a MAC com-123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354mand frame) to the incoming key usage policy checking procedure, as described in 7.2.14. If that procedure fails, the procedure shall set the unsecured frame to be the frame to be unsecured and return with a status of IMPROPER_KEY_TYPE.l)The procedure shall set the frame counter to the Frame Counter field of the auxiliary security header of the frame to be unsecured. If the frame counter has the value 0xffffffff, the procedure shall set the unsecured frame to be the frame to be unsecured and return with a status of COUNTER_ERROR.m)The procedure shall determine whether the frame counter is greater than or equal to the Frame-Counter element of the DeviceDescriptor. If this check fails, the procedure shall set the unsecured frame to be the frame to be unsecured and return with a status of COUNTER_ERROR.n)The procedure shall then use the ExtAddress element of the DeviceDescriptor, the frame counter, the security level, and the Key element of the KeyDescriptor to produce the unsecured frame, according to the CCM* inverse transformation process described in the security operations, as described in 7.3.5.1)If the security level specifies the use of encryption, as described in Table 57, the decryption operation shall be applied only to the actual payload field within the MAC payload, i.e., the Beacon Payload field, as defined in 5.2.2.1.8, Command Payload field, as defined in 5.2.2.4.3,or Data Payload field, as defined in 5.2.2.2.2, depending on the frame type. The corresponding payload field shall be passed to the CCM* inverse transformation process described in 7.3.5 as the secure payload.2)The remaining fields in the MAC payload part of the frame shall be passed to the CCM*inverse transformation process described in 7.3.5 as the non-payload fields.3)The ordering and exact manner of performing the decryption and integrity checking operations and the placement of the resulting decrypted data within the MAC payload field shall be as defined in 7.3.5.o)If the CCM* inverse transformation process fails, the procedure shall set the unsecured frame to be the frame to be unsecured and return with a status of SECURITY_ERROR.p)The procedure shall increment the frame counter by one and set the FrameCounter element of the DeviceDescriptor to the resulting value.q)If the FrameCounter element is equal to 0xffffffff, the procedure shall set the Blacklisted element of the KeyDeviceDescriptor to TRUE.r)The procedure shall return with the unsecured frame and a status of SUCCESS.7.2.4 Incoming frame key retrieval procedureThe input to this procedure is the frame to be unsecured. The outputs from this procedure are a passed or failed status and, if passed, a KeyDescriptor.The incoming frame key retrieval procedure involves the following steps as applicable:a)If the Key Identifier Mode field of the Security Control field of the auxiliary security header of the frame is set to 0x00 (implicit key identification), the procedure shall determine the key source lookup data and the key source lookup size as follows:1)If the source address mode of the Frame Control field of the frame is set to 0x00 and the mac-PANCoordShortAddress attribute is set to a value in the range 0x0000–0xfffd (i.e., the short address is used), the key source lookup data shall be set to the Destination PAN Identifier field of the frame right-concatenated (see C.2.1) with the macPANCoordShortAddress attribute. The key source lookup size shall be set to four.2)If the source address mode of the Frame Control field of the frame is set to 0x00 and the mac-PANCoordShortAddress attribute is set to 0xfffe (i.e., the extended address is used), the key source lookup data shall be set to the macPANCoordExtendedAddress attribute. The key source lookup size shall be set to eight.1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 543)If the source address mode of the Frame Control field of the frame is set to 0x02, the key sourcelookup data shall be set to the Source PAN Identifier field of the frame, or to the DestinationPAN Identifier field of the frame if the PAN ID Compression field of the Frame Control fieldof the frame is set to one, right-concatenated (see C.2.1) with the Source Address field of theframe. The key source lookup size shall be set to four.4)If the source address mode of the Frame Control field of the frame is set to 0x03, the key sourcelookup data shall be set to the Source Address field of the frame. The key source lookup sizeshall be set to eight.The key index shall be set to the single octet 0x00.b)If the Key Identifier Mode field of the Security Control field of the auxiliary security header of theframe is set to a value not equal to 0x00 (explicit key identification), the procedure shall determine the key source lookup data and key lookup size as follows:1)If the key identifier mode is set to 0x01, the key source lookup data shall be set to the macDe-faultKeySource attribute. The key source lookup size shall be set to eight.2)If the key identifier mode is set to 0x02, the key source lookup data shall be set to the KeySource field. The key source lookup size shall be set to four.3)If the key identifier mode is set to 0x03, the key source lookup data shall be set to the KeySource field. The key source lookup size shall be set to eight.The key index shall be set to the Key Index field of the Key Identifier field of the auxiliary security header.c)The procedure shall obtain the KeySourceDescriptor by passing the key source lookup data and thekey source lookup size to the KeySourceDescriptor lookup procedure as described in 7.2.9. If that procedure returns with a failed status, the procedure shall also return with a failed status.d)The procedure shall obtain the KeyDescriptor by passing the KeySourceDescriptor and the keyindex to the KeyDescriptor lookup procedure as described in 7.2.6. If that procedure returns with a failed status, the procedure shall also return with a failed status.e)The procedure shall return with a passed status having obtained the KeyDescriptor.7.2.5 Incoming frame device retrieval procedureThe input to this procedure is the frame to be unsecured. The outputs from this procedure are a passed or failed status and, if passed, a DeviceDescriptor.The incoming frame device retrieval procedure involves the following steps:a)The procedure shall determine the device lookup data and the device lookup size as follows:i)If the source address mode of the Frame Control field of the frame is set to 0x00 and themacP ANCoordShortAddress attribute is set to a value in the range 0x0000-0xfffd (i.e., theshort address is used), the device lookup data shall be set to the Destination PAN ID fieldof the frame right-concatenated (see B.1.1) with the macP ANCoordShortAddress attribute.The device lookup size shall be set to four.ii)If the source address mode of the Frame Control field of the frame is set to 0x00 and the macP ANCoordShortAddress attribute is set to a 0xfffe (i.e., the extended address is used),the device lookup data shall be set to the macP ANCoordExtendedAddress attribute. Thedevice lookup size shall be set to eight.iii)If the source address mode of the Frame Control field of the frame is set to 0x02, the device lookup data shall be set to the Source PAN ID field of the frame, or to the Destina-tion PAN ID field of the frame if the PAN ID Compression field of the Frame Control field123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354of the frame is set to one, right-concatenated (see B.1.1) with the Source Address field of the frame. The device lookup size shall be set to four.iv)If the source address mode of the Frame Control field of the frame is set to 0x03, thedevice lookup data shall be set to the Source Address field of the frame. The device lookup size shall be set to eight.b)The procedure shall obtain the DeviceDescriptor by passing the device lookup data and the device lookup size to the DeviceDescriptor lookup procedure as described in 7.2.8. If that procedure returns with a failed status, this procedure shall also return with a failed status.c)The procedure shall return with a passed status having obtained the DeviceDescriptor.7.2.6 KeyDescriptor lookup procedureThe inputs to this procedure are the KeySourceDescriptor and the key index. The outputs from this procedure are a passed or failed status and, if passed, a KeyDescriptor.The KeyDescriptor lookup procedure involves the following steps as applicable:a)For each KeyDescriptor in the macKeyTable attribute, the procedure shall check whether the Ext-KeySource element of the KeyDescriptor is equal to the corresponding element of the KeySource-Descriptor and whether the KeyIndex element of the KeyDescriptor is equal to the key index param-eter. If both checks pass (i.e., there is a match), the procedure shall return with this (matching)KeyDescriptor and a passed status.b)The procedure shall return with a failed status.7.2.7 KeyDeviceDescriptor lookup procedureThe inputs to this procedure are the KeyDescriptor and the DeviceDescriptor. The outputs from this proce-dure are a passed or failed status and, if passed, a KeyDeviceDescriptor.The KeyDeviceDescriptor lookup procedure involves the following steps:a)For each KeyDeviceDescriptor in the KeyDeviceList of the KeyDescriptor, the procedure shall check whether the ExtAddress element of the DeviceDescriptor is equal to the DeviceAddress ele-ment of the KeyDeviceDescriptor. If this check passes (i.e., there is a match), the procedure shall return with the KeyDeviceDescriptor and a passed status.b)The procedure shall return with a failed status.7.2.8 DeviceDescriptor lookup procedureThe inputs to this procedure are the device lookup data and the device lookup size. The output from this procedure is a passed or failed status and, if passed, a DeviceDescriptor.The DeviceDescriptor lookup procedure involves the following steps as applicable:a)For each DeviceDescriptor in the macDeviceTable attribute:i)If the device lookup size is four and the device lookup data is equal to the PAN ID element of the DeviceDescriptor right-concatenated (see C.2.1) with the ShortAddress element of the DeviceDescriptor (i.e., there is a match), this procedure shall return with a passed sta-tus.i)If the device lookup size is eight and the device lookup data is equal to the ExtAddress element of the DeviceDescriptor (i.e., there is a match), this procedure shall return with a passed status.b)The procedure shall return with a failed status.1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 547.2.9 KeySourceDescriptor lookup procedureThe inputs to this procedure are the key source lookup data and the key source lookup size. The output from this procedure are a passed or failed status and, if passed, a KeySourceDescriptor.The KeySourceDescriptor lookup procedure involves the following steps:a)For each KeySourceDescriptor in the macKeySourceTable attribute:i)If the key source lookup size is four and the key source lookup data is equal to the Short-KeySource element of the KeySourceDescriptor (i.e., there is a match), this procedureshall return with a passed status.ii)If the key source lookup size is eight and the key source lookup data is equal to the Ext-KeySource element of the KeySourceDescriptor (i.e., there is a match), this procedureshall return with a passed status.b)The procedure shall return with a failed status.7.2.10 Incoming security level checking procedureThe inputs to this procedure are the incoming security level, the frame type and the command frame identifier. The output from this procedure is a passed, failed, or “conditionally passed” status.The incoming security level checking procedure involves the following steps as applicable:a)For each SecurityLevelDescriptor in the macSecurityLevelTable attribute:1)If the frame type is not equal to 0x03 and the frame type is equal to the FrameType element ofthe SecurityLevelDescriptor, the procedure shall compare the incoming security level (asSEC1) with the SecurityMinimum element of the SecurityLevelDescriptor (as SEC2) accord-ing to the algorithm described in 7.4.1.1. If this comparison fails (i.e., evaluates to FALSE), theprocedure shall return with a “conditionally passed” status if the DeviceOverrideSecurityMini-mum element of the SecurityLevelDescriptor is set to TRUE and the security level is set to zeroand with a failed status otherwise.2)If the frame type is equal to 0x03, the frame type is equal to the FrameType element of theSecurityLevelDescriptor, and the command frame identifier is equal to the CommandFrame-Identifier element of the SecurityLevelDescriptor, the procedure shall compare the incomingsecurity level (as SEC1) with the SecurityMinimum element of the SecurityLevelDescriptor (asSEC2) according to the algorithm described in 7.4.1.1. If this comparison fails (i.e., evaluatesto FALSE), the procedure shall return with a “conditionally passed” status if the DeviceOver-rideSecurityMinimum element of the SecurityLevelDescriptor is set to TRUE and the securitylevel is set to zero and with a failed status otherwise.b)The procedure shall return with a passed status.7.2.11 Incoming key usage policy checking procedureThe inputs to this procedure are the KeyDescriptor, the frame type, and the command frame identifier. The output from this procedure is a passed or failed status.The incoming key usage policy checking procedure involves the following steps as applicable:a)For each KeyUsageDescriptor in the KeyUsageList of the KeyDescriptor:1)If the frame type is not equal to 0x03 and the frame type is equal to the FrameType element ofthe KeyUsageDescriptor, the procedure shall return with a passed status.。

CAPA(cGMP培训系列2)_2

CAPA(cGMP培训系列2)_2
• Nonconformities are cited during inspection,
and corrective action plan required.
• Warning Letter– more serious, available
to the public
• Fines, stop product
4
What are the symptoms of an eCAfPfAecstyisvteem? 好的预防纠偏系统有 那些特征?
• A reduction in quality i•sAsureesduction in the severity of i•sMsourees preventive actions over t•iMmoere consistent p•rIomdpurcotvse/dprcoucsetsosmeesr s•aBteitstfearctbiuosniness results
auodbistervations, ianutdeirtnsaland external audits
• Quality Records
▫ Periodic r▫evPireowcess c▫onTtersotling results, trends,
• Peotsct Market
dat▫a Frequency and
used
• Document
▫ Dates of i▫nvDeasttaigraetviioenwed (data
sources, records, dates)
Cause and Effect, 6 M’s 5 Why’s, etc.
▫ Corrections or

新核心综合学术英语教程第二册Unit6解析

新核心综合学术英语教程第二册Unit6解析

the Healthpartners Research Foundation
• HealthPartners is an integrated, nonprofit health care provider located in Bloomington, Minnesota offering care, coverage, research and education to its members, patients and the community. HealthPartners was founded in 1957 as Group Health, a consumergoverned nonprofit health plan with a board of directors made up of its own members and patients. In 1992, Group Health merged with MedCenters Health Plan, and together they formed HealthPartners. In late 2012 it was announced that HealthPartners would merge with Park Nicollet Health Services of St. Louis Park on January 1, 2013 following federal approval
— Samuel Johnson • The function of education, therefore, is to teach one to think
intensively and to think critically. But education which stops with efficiency may prove the greatest menace to society. The most dangerous criminal may be the man gifted with reason, but with no morals… We must remember that intelligence is not enough. Intelligence plus character—that is the goal of true education.

新教材北师大版大英语课件UNIT6SectionⅡ教学知识细解码_4

新教材北师大版大英语课件UNIT6SectionⅡ教学知识细解码_4

15
知识要点3 awareness n.认识;意识
(教材 P58~59) He realised that his roles in these films had given him the opportunity to be a real-life superman, and he soon gained a reputation for raising awareness for good causes.
3
[知识拓展] (1)regard...as... with/in regard to (2)regarding prep.
把……看作 关于 关于
14
[即学即练] ①He was regarded as the most successful Chancellor of modern times. ②Call me if you have any problems regarding (regard) your work. ③With regard to hardness, the diamond is in a class by itself.
UNIT 6 THE ADMIRABLE
Section Ⅱ Lesson 2 & Lesson 3 教学知识细解码
2
1.independent adj.独立的,自主的→ independence n.独立 2.impress vt.使印象深刻;使铭记→ impressive adj.令人钦佩的, 给人印象深刻的→impression n.印象 3.aware adj.知道的,意识到的→ awareness n.认识;意识 4.move vt.移动;前进→movement n.运动,动作,活动

学术综合英语unit1_5课后习题答案解析

学术综合英语unit1_5课后习题答案解析

Task 2 A contrary to implicit assertion look up adaptedSustain unbiased In the course of metaphor clutterB bolster credible impromptu sparingly anecdoteCredentials testimony hypothetical paraphrase juxtapositionTask 3 TranslationB.发言提纲是有效发言的基础。

通过写发言提纲,你可以确保你的思想是相关联的,你的思路从一点谈到另一点,你的讲话结构是连贯的。

通常,准备讲演你可以采用两种提纲方式:详细准备提纲和简单发言提纲。

在准备发言提纲中,应该写出你的特定目的及中心思想,并以连贯的方式确定主要观点和次要观点,发言提纲应该由简要的提要组成,这些提要在你讲话时能够给予你一些帮助。

发言提纲还应该包括帮助你记忆的重点词或重点短语。

在写发言提纲时,可采用准备提纲的模式,尽可能使你的发言提纲简要,同时,要确保提纲清晰,易于辨认。

C. 1. The younger generation should continue to sustain and develop our fine traditions and long-standing culture.2. In the course of preparing one’s speech, one should be clearly aware of how one could make effective use of statistics and examples to bolster one’s point of view.3. An impromptu speech is one of the speaking skills that college students should learn and develop through practice.4. By using simile and metaphor, you can make your language more vivid and more attractive to your audience.5. The proper examples you cite might help reinforce the impression on your listeners and make your viewpoints more convincing.6. When you are speaking, you should choose common and easy words and at the same time avoid clutter in you speech.7. When you write a paper, citing the views from some experts is a good way to make your ideas more credible.8. A good method of delivering a speech will improve its quality and will help convey the speakers’ ideas clearly and interestingly.9. You should mot blindly use a word that you are not sure about, and if you are not sure, look up the word in a dictionary.10. Your language should adapt to the particular occasion and audience. If your language is appropriate in all respects, your speech is successful.D. Before you deliver an academic speech, you should, first of all, get well prepared for it. Then, you should make your major points clear in your speech, and your speech should be well organized. When speaking, you should not speak too fast, and your language should be exp licit. Don’t always read the notes you prepared beforehand. From time to time, you should look at your audience. On one hand, you can show your respect to your audience, and on the other hand, you will be able to go on with your speech more smoothly.T ask 2 Vocabulary Developmentdevastating posed massive contribute to triple menace liability consensus entails plausibleplausible portend pin down aggravating staggeringon a par with emergence resurgence detract from inadequacyT ask 3 TranslationB.能源和人类利益有着双重关系。

资本资产定价模型CAPM和公式

资本资产定价模型CAPM和公式

【量化课堂】CAPM 模型和公式JoinQuant量化课堂发布于 2016-08-18218081457导语:αα和ββ你肯定都听说过吧。

那么γγ呢?δδ?εε?ζζ,ηη,θθ,ιι,... ωω???那好!我们今天就来告诉你...... ββ是什么。

作者:肖睿编辑:宏观经济算命师本文由JoinQuant量化课堂推出,难度为进阶上,深度为 level-2。

阅读本文需要掌握MPT 模型(level-1)和微积分(level-0)的知识。

本文是一系列文章中的第三篇。

本系列从基础概念入手,推导出 CAPM 模型。

系列中共有四篇:1.效用模型2.风险模型3.MPT 模型4.CAPM 模型5.概述CAPM,全称 Capital Asset Pricing Model,译为资本资产定价模型,是由 Treynor, Sha rpe, Lintner, Mossin 几人分别提出。

搭建于 Markowitz 的现代资产配置理论(MPT)之上,该模型用简单的数学公式表述了资产的收益率与风险系数ββ以及系统性风险之间的关系。

尽管 CAPM 的假设偏于牵强,结论也常与实验证据相悖,但它一直是金融经济学中重要的理论,为更多先进的模型打好了基础。

模型假设CAPM 是一个理论性很强的模型,它所假设的金融市场有一个非常简单的框架,这样不仅简化了分析的难度,也用非常简练的数学公式表达出结论。

CAPM 假设,市场上所有的投资者对于风险和收益的评估仅限于对于收益变量的预期值和标准差的分析,而且所有投资者都是完全理智的。

并且,市场是完全公开的,所有投资者的信息和机会完全平等,任何人都可以以唯一的无风险利率无限制地贷款或借出。

因此,所有投资者必定在进行资产分配时计算同样的优化问题,并且得到同样的有效前沿和资本市场线(见MPT 模型)。

为了最大化预期收益并最小化标准差,所有投资者必定选择资本市场线上的一点作为资产配置。

也就是说,所有投资者都按一定比例持有现金和市场组合M M。

essentials of investments 12th 解答

essentials of investments 12th 解答

essentials of investments 12th 解答题目:Essentials of Investments 12th 解答摘要:本文以中括号内的内容为主题,以一步一步回答的方式来解答关于《Essentials of Investments 12th》的问题。

文章从探讨投资的基本概念和原则开始,然后介绍了投资组合的构建和管理,接着讨论了股票、债券和其他投资工具以及相关的风险和回报。

最后,本文探讨了金融市场的运作和交易策略等内容。

正文:Essentials of Investments 12th 是一本经典的投资学教材,涵盖了投资理论和实践的各个方面。

它提供了一系列丰富的案例和习题,帮助读者加深对投资的理解。

在本文中,我们将一步一步回答有关《Essentials of Investments 12th》的问题,并探讨其中涉及的关键概念和原则。

第一步:了解投资的基本概念和原则为了理解《Essentials of Investments 12th》的内容,首先需要了解投资的基本概念和原则。

投资是指将资金投入可预期获得回报的资产,以实现财务目标。

投资者根据自己的风险偏好和投资目标选择适合的投资策略。

投资组合理论提供了在不同资产之间分散投资来降低风险的方法。

第二步:投资组合的构建和管理《Essentials of Investments 12th》进一步介绍了投资组合的构建和管理的原理和方法。

投资组合是指将不同类型的资产进行适当配置,以最大程度地实现投资者的目标。

投资组合需要考虑资产的预期回报和风险,并根据投资者的时间偏好和目标制定适合的策略。

资本资产定价模型(CAPM)和有效市场假说(EMH)等理论也被引入到投资组合的构建和管理中。

第三步:股票、债券和其他投资工具《Essentials of Investments 12th》深入探讨了股票、债券和其他投资工具,以及它们的特点和风险。

股票是公司的所有权证明,投资者可以通过购买股票分享公司的收益和资本增值。

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i 1
T
T

Using the data in Table 10.1:

Your best guess about the size of the return for a year selected at random is 11.7%.
◦ Sum the returns for large-company stocks from 1926 through 2008, you get about 9.71/83 years = 11.7%.


Expected returns are based on the probabilities of possible outcomes In this context, “expected” means average if the process is repeated many times




Large-Company Stock Returns
Long-Term Government Bond Returns
U.S. Treasury Bill Returns
Investment Large Stocks
Small Stocks Long-term Corporate Bonds Long-term Government Bonds U.S. Treasury Bills Inflation

From the previous problem, what was the dividend yield and capital gains yield?

The dividend yield is the dividend divided by price at the beginning of the period



The total dollar return is the change in price plus the coupon payment
A. Total dollar return = ($1056-$1090)+ 80= $ 46 B. Total nominal percentage return of the bond = ($1056-1090) + 80 / $ 1,090 R =4.22% C. Using the Fisher equation, real return= (1+R) = (1+r)(1+h) r= (1.0422/1.030) – 1 r = 1.18%
Table 10.2
Average Return 11.7%
16.4% 6.2% 6.1% 3.8% 3.1%

Historical Average Return = simple, or arithmetic average
His tor ical Ave r age Re turn
ye arlyre turn


Note: The return on any asset is the increase in price, plus any dividends or cash flows, all divided by the initial price.

(($104 -92) + 1.45) / $92 R= 14.62%

A basket of 500 stocks that are considered to be widely held. The S&P 500 index is weighted by market value, and its performance is thought to be representative of the stock market as a whole.


Suppose you have predicted the following returns for stocks C and T in three possible states of nature. What are the expected returns? ◦ State Probability C T ◦ Boom 0.3 15 25 ◦ Normal 0.5 10 20 ◦ Recession 0.2 2 1 RC = .3(15%) + .5(10%) + .2(2%) = 9.9% RT = .3(25%) + .5(20%) + .2(1%) = 17.7%





Dow Jones Industrial Average (The Dow) Price weighted index Closed at 11,189 on 11/2/10
Standard & Poor’s Composite Index (The S&P 500)


Value of a portfolio holding shares in 500 firms. Holdings are proportional to tket Capitalization index)

For example, assume that an index contains only two stocks, one priced at $1 and one priced at $10. The $10 stock is weighted nine times higher than the $1 stock. Overall, this means that this index is composed of 90% of the $10 stocks and 10% of $1 stock. In this case, a change in the value of the $1 stock will not affect the index's value by a large amount, because it makes up such a small percentage of the index.

Suppose a stock had an initial price of $92 per share, paid a dividend of $1.45 per share during the year, and had an ending share of $104. Compute the percentage total return.
USC Dr. Bemis

Know how to calculate expected returns Understand the impact of diversification Understand the systematic risk principle Understand the risk-return trade-off Be able to use the Capital Asset Pricing Model

$1.45/$92 = 1.58%

The capital gains yield is the increase in price divided by the initial price

Capital gains yield = $104-$92/$92= 13.04%

Suppose you bought a 8 percent coupon bond one year ago for $1090. The bond sells for $1056 today. A. Assuming a $1,000 face value, what was your total dollar return on this investment over the past year? B. What was your total nominal rate of return on this investment over the past year? C. If the inflation rate last year was 3 percent, what was your total real rate of return on this investment?

The average is named after Dow and one of his business associates, a statistician, Edward Jones. It is an index that shows how certain large, publicly-owned companies have traded during a standard trading session in the stock market. The performance of the Dow continues to be influenced by not only corporate and economic reports, but also by domestic and foreign political events such as war and terrorism, as well as by natural disasters. The average is computed by the stock prices of 30 of the largest and most widely held public companies in the United States. It is among the most closely-watched benchmark indices tracking targeted stock market activity.
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