1 / 35

Understanding Security Returns: Empirical Evidence & Model Testing

Explore empirical evidence on security returns through CAPM and APT models, volatility studies, return-beta relationships, and more.

croos
Download Presentation

Understanding Security Returns: Empirical Evidence & Model Testing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CHAPTER 13 Empirical Evidence on Security Returns

  2. Overview of Investigation Tests of the single factor CAPM or APT Model Tests of the Multifactor APT Model Results are difficult to interpret Studies on volatility of returns over time

  3. The Index Model and the Single-Factor APT Expected Return-Beta Relationship Estimating the SCL

  4. Tests of the CAPM Tests of the expected return beta relationship: First Pass Regression Estimate beta, average risk premiums and unsystematic risk Second Pass: Using estimates from the first pass to determine if model is supported by the data Most tests do not generally support the single factor model

  5. Single Factor Test Results Return % Predicted Actual Beta

  6. Roll’s Criticism The only testable hypothesis is on the efficiency of the market portfolio In any sample of observations of individual returns Infinite number of ex post mean-variance efficient portfolios using the sample-period returns and covariances CAPM is not testable unless we know the exact composition of the true market portfolio and use it in the tests Benchmark error

  7. Measurement Error in Beta Statistical property If beta is measured with error in the first stage, second stage results will be biased in the direction the tests have supported Test results could result from measurement error

  8. Table 13.1 Summary of Fama and MacBeth (1973) Study (All Rates in Basis Points per Month)

  9. Jaganathan and Wang Study Included factors for cyclical behavior of betas and human capital When these factors were included the results showed returns were a function of beta Size is not an important factor when cyclical behavior and human capital are included

  10. Table 13.2 Evaluation of Various CAPM Specifications

  11. Table 13.3 Portfolio Shares Relative to Total Assets by Age and Net Worth

  12. Table 13.4 Determinants of Stockholdings

  13. Tests of the Multifactor Model Chen, Roll and Ross 1986 Study Factors Growth rate in industrial production Changes in expected inflation Unexpected inflation Unexpected Changes in risk premiums on bonds Unexpected changes in term premium on bonds

  14. Study Structure & Results Method: Two -stage regression with portfolios constructed by size based on market value of equity Fidings Significant factors: industrial production, risk premium on bonds and unanticipated inflation Market index returns were not statistically significant in the multifactor model

  15. Table 13.5 Economic Variables and Pricing (Percent per Month x 10), Multivariate Approach

  16. Fama-French Three Factor Model Size and book-to-market ratios explain returns on securities Smaller firms experience higher returns High book to market firms experience higher returns Returns are explained by size, book to market and by beta

  17. Table 13.6 Three Factor Regressions for Portfolios Formed from Sorts on Size and Book-to-Market Ratios (B/M)

  18. Interpretation of Three-Factor Model Size is a proxy for risk that is not captured in CAPM Beta Premiums are due to investor irrationality or behavioral biases

  19. Risk-Based Interpretations Liew and Vassalou Petkova and Zhang

  20. Figure 13.1 Difference in Return to Factor Portfolios in Year Prior to Above-Average versus Below-Average GDP Growth

  21. Figure 13.2 HML Beta in Different Economic States

  22. Behavioral Explanations Market participants are overly optimistic Analysts extrapolate recent performance too far into the future Prices on these glamour stocks are overly optimistic Lower book-to-market on these glamour firms leads to underperformance compared to value stocks Chan, Karceski and Lakonishok LaPort, Lakonishok, Shleifer and Vishny

  23. Figure 13.3 The Book-to-Market Ratio Reflects Past Growth, but Not Future Growth Prospects

  24. Figure 13.4 Value minus Glamour Returns Surrounding Earnings Announcements, 1971-1992

  25. Liquidity and Asset Pricing Acharya and Pedersen Premiums observed in the three-factor model may be illiquidity premiums Liquidity may explain the size premium but not the book-to-market premium

  26. Table 13.7 Properties of Liquidity Portfolios

  27. Table 13.8 Estimates of the CAPM With and Without Liquidity Factors

  28. Time-Varying Volatility Stock prices change primarily in reaction to information New information arrival is time varying Volatility is therefore not constant through time

  29. Stock Volatility Studies and Techniques Volatility is not constant through time Improved modeling techniques should improve results of tests of the risk-return relationship ARCH and GARCH models incorporate time varying volatility

  30. Figure 13.5 Estimates of the Monthly Stock Return Variance 1835 - 1987

  31. Figure 13.6 Implied Versus Estimated Volatility

  32. Equity Premium Puzzle Rewards for bearing risk appear to be excessive Possible Causes CAPM doesn’t consider the impact of consumption Predicting returns from realized returns Survivorship bias also creates the appearance of abnormal returns in market efficiency studies

  33. Table 13.9 Annual Consumption Growth, 1954-2003 (%)

  34. Table 13.10 Annual Excess Returns and Consumption Betas

  35. Figure 13.7 Cross-Section of Stock Returns: Fama-French 25 Portfolios, 1954-2003

More Related