 Introduction to Risk, Return, and the Opportunity Cost of Capital Principles of Corporate Finance Brealey and Myers Sixth Edition Slides by Matthew Will Chapter 7 © The McGraw-Hill Companies, Inc. Irwin/McGraw Hill

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill 7- 2 Topics Covered  72 Years of Capital Market History  Measuring Risk  Portfolio Risk  Beta and Unique Risk  Diversification

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill 7- 3 The Value of an Investment of $1 in 1926 Source: Ibbotson Associates Index Year End

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill 7- 4 The Value of an Investment of $1 in 1926 Source: Ibbotson Associates Index Year End Real returns

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill 7- 5 Rates of Return Source: Ibbotson Associates Year Percentage Return

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill 7- 6 Measuring Risk Variance - Average value of squared deviations from mean. A measure of volatility. Standard Deviation - Average value of squared deviations from mean. A measure of volatility.

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill 7- 7 Measuring Risk Coin Toss Game-calculating variance and standard deviation

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill 7- 8 Measuring Risk Return % # of Years Histogram of Annual Stock Market Returns

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill 7- 9 Measuring Risk Diversification - Strategy designed to reduce risk by spreading the portfolio across many investments. Unique Risk - Risk factors affecting only that firm. Also called “diversifiable risk.” Market Risk - Economy-wide sources of risk that affect the overall stock market. Also called “systematic risk.”

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Measuring Risk

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Measuring Risk

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Measuring Risk

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Portfolio Risk The variance of a two stock portfolio is the sum of these four boxes:

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Portfolio Risk Example Suppose you invest $55 in Bristol-Myers and $45 in McDonald’s. The expected dollar return on your BM is.10 x 55 = 5.50 and on McDonald’s it is.20 x 45 = The expected dollar return on your portfolio is = The portfolio rate of return is 14.40/100 =.144 or 14.4%. Assume a correlation coefficient of 1.

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Portfolio Risk Example Suppose you invest $55 in Bristol-Myers and $45 in McDonald’s. The expected dollar return on your BM is.10 x 55 = 5.50 and on McDonald’s it is.20 x 45 = The expected dollar return on your portfolio is = The portfolio rate of return is 14.40/100 =.144 or 14.4%. Assume a correlation coefficient of 1.

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Portfolio Risk Example Suppose you invest $55 in Bristol-Myers and $45 in McDonald’s. The expected dollar return on your BM is.10 x 55 = 5.50 and on McDonald’s it is.20 x 45 = The expected dollar return on your portfolio is = The portfolio rate of return is 14.50/100 =.145 or 14.5%. Assume a correlation coefficient of 1.

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Portfolio Risk

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Portfolio Risk The shaded boxes contain variance terms; the remainder contain covariance terms N N STOCK To calculate portfolio variance add up the boxes

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Beta and Unique Risk beta Expected return Expected market return 10% %+10% stock Copyright 1996 by The McGraw-Hill Companies, Inc -10% 1. Total risk = diversifiable risk + market risk 2. Market risk is measured by beta, the sensitivity to market changes.

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Beta and Unique Risk Market Portfolio - Portfolio of all assets in the economy. In practice a broad stock market index, such as the S&P Composite, is used to represent the market. Beta - Sensitivity of a stock’s return to the return on the market portfolio.

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Beta and Unique Risk

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Beta and Unique Risk Covariance with the market Variance of the market

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Market Risk  Market risk adalah resiko yang timbul karena perubahan harga aset seperti saham, obligasi, SUN, reksadana, valas, dsb.  Market risk secara kuantitatif dapat di ukur melalui Value at Risk (VaR).  VaR berguna (1) mengukur kecukupan modal minimun utk mengcover market risk, (2) perusahaan yang invest dapat mengukur resiko investasi portfolio_nya

© The McGraw-Hill Companies, Inc., 2000 Irwin/McGraw Hill Market Risk, VaR diukur melalui  Variance-Covariance Method  Simulasi  Monte Carlo  Boostrap  Stress Testing  Extreme Value Theory  Crash metrik