Some Lessons from Capital Market History

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Presentation transcript:

Some Lessons from Capital Market History 12 Some Lessons from Capital Market History

Key Concepts and Skills Know how to calculate the return on an investment Understand the historical returns on various types of investments Understand the historical risks on various types of investments

Chapter Outline Returns The Historical Record Average Returns: The First Lesson The Variability of Returns: The Second Lesson More on Average Returns Capital Market Efficiency

Risk, Return and Financial Markets We can examine returns in the financial markets to help us determine the appropriate returns on non-financial assets Lessons from capital market history There is a reward for bearing risk The greater the potential reward, the greater the risk This is called the risk-return trade-off

Dollar Returns Total dollar return = income from investment + capital gain (loss) due to change in price Example: You bought a bond for $950 one year ago. You have received two coupons of $30 each. You can sell the bond for $975 today. What is your total dollar return? Income = 30 + 30 = 60 Capital gain = 975 – 950 = 25 Total dollar return = 60 + 25 = $85 Be sure to emphasize that you do not have to actually sell the bond (or any other asset) for you to earn the dollar return. The point is that you could.

Percentage Returns It is generally more intuitive to think in terms of percentages than in dollar returns Dividend yield = income / beginning price Capital gains yield = (ending price – beginning price) / beginning price Total percentage return = dividend yield + capital gains yield Note that the “dividend” yield is really just the yield on cash flows received from the security (other than the selling price)

Example – Calculating Returns You bought a stock for $35 and you received dividends of $1.25. The stock is now selling for $40. What is your dollar return? Dollar return = 1.25 + (40 – 35) = $6.25 What is your percentage return? Dividend yield = 1.25 / 35 = 3.57% Capital gains yield = (40 – 35) / 35 = 14.29% Total percentage return = 3.57 + 14.29 = 17.86% You might want to point out that total percentage return is also equal to total dollar return / beginning price. Total percentage return = 6.25 / 35 = 17.86%

The Importance of Financial Markets Financial markets allow companies, governments and individuals to increase their utility Savers have the ability to invest in financial assets so that they can defer consumption and earn a return to compensate them for doing so Borrowers have better access to the capital that is available so that they can invest in productive assets Financial markets also provide us with information about the returns that are required for various levels of risk

Figure 12.4

Year-to-Year Total Returns Large-Company Stock Returns Long-Term Government Bond Returns Click on each of the excel icons to see a chart of year-to-year returns similar to the charts in the text. The charts were created using the data in Table 12.1. U.S. Treasury Bill Returns

Average Returns Investment Average Return Large stocks 12.4% Small Stocks 17.5% Long-term Corporate Bonds 6.2% Long-term Government Bonds 5.8% U.S. Treasury Bills 3.8% Inflation 3.1%

Risk Premiums The “extra” return earned for taking on risk Treasury bills are considered to be risk-free The risk premium is the return over and above the risk-free rate

Table 12.3 Average Annual Returns and Risk Premiums Investment Average Return Risk Premium Large stocks 12.4% 8.6% Small Stocks 17.5% 13.7% Long-term Corporate Bonds 6.2% 2.4% Long-term Government Bonds 5.8% 2.0% U.S. Treasury Bills 3.8% 0.0% Ask the students to think about why the different investments have different risk premiums. Large stocks: 12.4 – 3.8 = 8.6 Small stocks: 17.5 – 3.8 = 13.7 LT Corp. bonds: 6.2 – 3.8 = 2.4 LT Gov’t. bonds: 5.8 – 3.8 = 2.0

Figure 12.9

Variance and Standard Deviation Variance and standard deviation measure the volatility of asset returns The greater the volatility, the greater the uncertainty Historical variance = sum of squared deviations from the mean / (number of observations – 1) Standard deviation = square root of the variance

Example – Variance and Standard Deviation Year Actual Return Average Return Deviation from the Mean Squared Deviation 1 .15 .105 .045 .002025 2 .09 -.015 .000225 3 .06 -.045 4 .12 .015 Totals .42 .00 .0045 Remind students that the variance for a sample is computed by dividing by the number of observations – 1 The standard deviation is just the square root Variance = .0045 / (4-1) = .0015 Standard Deviation = .03873

Work the Web Example How volatile are mutual funds? Morningstar provides information on mutual funds, including volatility Click on the web surfer to go to the Morningstar site Pick a fund, such as the Aim European Development fund (AEDCX) Enter the ticker, press go and then scroll down to volatility

Figure 12.11

Arithmetic vs. Geometric Mean Arithmetic average – return earned in an average period over multiple periods Geometric average – average compound return per period over multiple periods The geometric average will be less than the arithmetic average unless all the returns are equal Which is better? The arithmetic average is overly optimistic for long horizons The geometric average is overly pessimistic for short horizons So the answer depends on the planning period under consideration 15 – 20 years or less: use arithmetic 20 – 40 years or so: split the difference between them 40 + years: use the geometric

Example: Computing Averages What is the arithmetic and geometric average for the following returns? Year 1 5% Year 2 -3% Year 3 12% Arithmetic average = (5 + (–3) + 12)/3 = 4.67% Geometric average = [(1+.05)*(1-.03)*(1+.12)]1/3 – 1 = .0449 = 4.49%

Efficient Capital Markets Stock prices are in equilibrium or are “fairly” priced If this is true, then you should not be able to earn “abnormal” or “excess” returns Efficient markets DO NOT imply that investors cannot earn a positive return in the stock market

Figure 12.12

What Makes Markets Efficient? There are many investors out there doing research As new information comes to market, this information is analyzed and trades are made based on this information Therefore, prices should reflect all available public information If investors stop researching stocks, then the market will not be efficient Point out that one consequence of the wider availability of information and lower transaction costs is that the market will be more volatile. It is easier to trade on “small” news instead of just big events. It is also important to remember that not all available information is reliable information. It’s important to still do the research and not just jump on everything that crosses the news wire. The case of Emulex, discussed earlier, is an excellent example.

Common Misconceptions about EMH Efficient markets do not mean that you can’t make money They do mean that, on average, you will earn a return that is appropriate for the risk undertaken and there is not a bias in prices that can be exploited to earn excess returns Market efficiency will not protect you from wrong choices if you do not diversify – you still don’t want to put all your eggs in one basket

Strong Form Efficiency Prices reflect all information, including public and private If the market is strong form efficient, then investors could not earn abnormal returns regardless of the information they possessed Empirical evidence indicates that markets are NOT strong form efficient and that insiders could earn abnormal returns Students are often very interested in insider trading. See the IM for a more detailed discussion.

Semistrong Form Efficiency Prices reflect all publicly available information including trading information, annual reports, press releases, etc. If the market is semistrong form efficient, then investors cannot earn abnormal returns by trading on public information Implies that fundamental analysis will not lead to abnormal returns Empirical evidence suggests that some stocks are semistrong form efficient, but not all. Larger, more closely followed stocks are more likely to be semistrong form efficient. Small, more thinly traded stocks may not be semistrong form efficient but liquidity costs may wipe out any abnormal returns that are available.

Weak Form Efficiency Prices reflect all past market information such as price and volume If the market is weak form efficient, then investors cannot earn abnormal returns by trading on market information Implies that technical analysis will not lead to abnormal returns Empirical evidence indicates that markets are generally weak form efficient Emphasize that just because technical analysis shouldn’t lead to abnormal returns, that doesn’t mean that you won’t earn fair returns using it – efficient markets imply that you will. You might also want to point out that there are many technical trading rules that have never been empirically tested; so it is possible that one of them might lead to abnormal returns. But if it is well publicized, then any abnormal returns that were available will soon evaporate.

Quick Quiz Which of the investments discussed have had the highest average return and risk premium? Which of the investments discussed have had the highest standard deviation? What is capital market efficiency? What are the three forms of market efficiency?

12 End of Chapter