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CORPORATE FINANCIAL THEORY Lecture 2
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Risk /Return Return = r = Discount rate = Cost of Capital (COC) r is determined by risk Two Extremes Treasury Notes are risk free = Return is low Junk Bonds are high risk = Return is high
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Risk Variance & Standard Deviation yard sticks that measures risk
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The Value of an Investment of $1 in 1900 2013
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Source: Ibbotson Associates Year Percentage Return Stock Market Index Returns 2012 Rates of Return 1900-2012
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Risk premium, % Country Average Market Risk Premia (by country)
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Diversification Diversification is the combining of assets. In financial theory, diversification can reduce risk. The risk of the combined assets is lower than the risk of the assets held separately.
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Efficient Frontier Example Correlation Coefficient =.4 Stocks % of PortfolioAvg Return ABC Corp2860% 15% Big Corp42 40% 21% Standard Deviation = weighted avg = 33.6% Standard Deviation = Portfolio = 28.1 % Return = weighted avg = Portfolio = 17.4% Additive Standard Deviation (common sense): =.28 (60%) +.42 (40%) = 33.6% WRONG Real Standard Deviation:
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Efficient Frontier Example Correlation Coefficient =.4 Stocks % of PortfolioAvg Return ABC Corp2860% 15% Big Corp42 40% 21% Standard Deviation = weighted avg = 33.6% Standard Deviation = Portfolio = 28.1 % Return = weighted avg = Portfolio = 17.4% Let’s Add stock New Corp to the portfolio
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Efficient Frontier Previous Example Correlation Coefficient =.3 Stocks % of PortfolioAvg Return Portfolio28.150% 17.4% New Corp30 50% 19% NEW Standard Deviation = weighted avg = 31.80% NEW Standard Deviation = Portfolio = 23.43 % NEW Return = weighted avg = Portfolio = 18.20%
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Efficient Frontier Previous Example Correlation Coefficient =.3 Stocks % of PortfolioAvg Return Portfolio28.150% 17.4% New Corp30 50% 19% NEW Standard Deviation = weighted avg = 31.80 % NEW Standard Deviation = Portfolio = 23.43 % NEW Return = weighted avg = Portfolio = 18.20% NOTE: Higher return & Lower risk How did we do that? DIVERSIFICATION
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Portfolio Risk / Return
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Efficient Frontier A B Return Risk (measured as )
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Efficient Frontier A B Return Risk AB
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Efficient Frontier A B N Return Risk AB
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Efficient Frontier A B N Return Risk AB ABN
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Efficient Frontier A B N Return Risk AB Goal is to move up and left. WHY? ABN
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Efficient Frontier Goal is to move up and left. WHY? The ratio of the risk premium to the standard deviation is called the Sharpe ratio:
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Efficient Frontier Return Risk Low Risk High Return High Risk High Return Low Risk Low Return High Risk Low Return
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Efficient Frontier Return Risk Low Risk High Return High Risk High Return Low Risk Low Return High Risk Low Return
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Efficient Frontier Return Risk A B N AB ABN
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Markowitz Portfolio Theory Combining stocks into portfolios can reduce standard deviation, below the level obtained from a simple weighted average calculation. Correlation coefficients make this possible. efficient portfolios The various weighted combinations of stocks that create this standard deviations constitute the set of efficient portfolios.
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Efficient Frontier Standard Deviation Expected Return (%) Each half egg shell represents the possible weighted combinations for two stocks. The composite of all stock sets constitutes the efficient frontier
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Efficient Frontier 4 Efficient Portfolios all from the same 10 stocks
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Measuring Risk
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Diversification 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.”
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Security Market Line Return Risk. rfrf Risk Free Return = Efficient Portfolio Market Return = r m
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$1 Invested Growth (variable debt) Leverage Varies to Match Growth Fund
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$1 Invested Growth (constant debt) Leverage set at 20%
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Security Market Line Return Risk. rfrf Risk Free Return = Efficient Portfolio Market Return = r m
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Security Market Line Return. rfrf Risk Free Return = Efficient Portfolio Market Return = r m BETA1.0
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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.
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Beta and Unique Risk
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Covariance with the market Variance of the market
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Beta
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Security Market Line Return. rfrf Risk Free Return = BETA Security Market Line (SML)
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Security Market Line Return BETA rfrf 1.0 SML SML Equation = r f + B ( r m - r f )
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Capital Asset Pricing Model R = r f + B ( r m - r f ) CAPM
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Company Cost of Capital A company’s cost of capital can be compared to the CAPM required return Required return Project Beta 1.13 Company Cost of Capital 12.9 5.0 0 SML
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Arbitrage Pricing Theory Alternative to CAPM
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Arbitrage Pricing Theory Estimated risk premiums for taking on risk factors (1978-1990)
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Three Factor Model Steps 1. Identify macroeconomic factors that could affect stock returns 2. Estimate expected risk premium on each factor ( r factor1 − r f, etc.) 3. Measure sensitivity of each stock to factors ( b 1, b 2, etc.)
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Three Factor Model Three-Factor Model. Factor Sensitivities.CAPM b market b size b book-to- market Expected return* Expected return** Autos1.51.070.9115.77.9 Banks1.16-.25.711.16.2 Chemicals1.02-.07.6110.25.5 Computers1.43.22-.876.512.8 Construction1.40.46.9816.67.6 Food.53-.15.475.82.7 Oil and gas0.85-.130.548.54.3 Pharmaceuticals0.50-.32-.131.94.3 Telecoms1.05-.29-.165.77.3 Utilities0.61-.01.778.42.4 The expected return equals the risk-free interest rate plus the factor sensitivities multiplied by the factor risk premia, that is, rf + (b market x 7) + (b size x 3.6) + (b book-to-market x 5.2) ** Estimated as r f + β(r m – r f ), that is rf + β x 7.
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Testing the CAPM Average Risk Premium 1931-2008 Portfolio Beta 1.0 SML 20 12 0 Investors Market Portfolio Beta vs. Average Risk Premium
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Testing the CAPM Portfolio Beta 1.0 SML 12 8 4 0 Investors Market Portfolio Beta vs. Average Risk Premium Average Risk Premium 1966-2008
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Measuring Betas
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Estimated Betas Beta Standard Error Canadian Pacific 1.27.10 CSX 1.41.08 Kansas City Southern 1.68.12 Genesee & Wyoming 1.25.08 Norfolk Southern 1.42.09 Rail America 1.15.14 Union Pacific 1.21.07 Industry portfolio 1.34.06
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Beta Stability % IN SAME % WITHIN ONE RISK CLASS 5 CLASS 5 CLASS YEARS LATER YEARS LATER 10 (High betas) 35 69 9 18 54 8 16 45 7 13 41 6 14 39 5 14 42 4 13 40 3 16 45 2 21 61 1 (Low betas) 40 62 Source: Sharpe and Cooper (1972)
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Copyright © 2012 by Dr. Matthew Will. All rights reserved
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Source: CalPERS 2005 Annual Investment Report, http://www.calpers.ca.gov/index.jsp?bc=/investments/assets/assetallocation.xml
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Copyright © 2012 by Dr. Matthew Will. All rights reserved Source: CICF 2006 Audit Report, CICF Portfolio Review, June 30, 2012
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Copyright © 2012 by Dr. Matthew Will. All rights reserved © Dow Jones Credit Suisse
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Copyright © 2012 by Dr. Matthew Will. All rights reserved US PUBLIC EQUITIES Standard deviation = 17.1% Return = 7.5% Sharpe ratio =.43 S&P 500 Index Note: Assumes a treasury yield of 0.20% HEDGE FUNDS Standard deviation = 7.0% Return = 8.4% Sharpe ratio =.81 HFR Fund of Funds Composite Index
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Copyright © 2012 by Dr. Matthew Will. All rights reserved
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Cambridge Associates LLC U.S. Private Equity Index® S&P (1986 – 2012) Since Inception IRR & Multiples By Fund Vintage Year, Net to Limited Partners as of March 31, 2012, starting with vintage year 1986
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