In a report, use the sample information to
1. Estimate and interpret CAPM: R − Rf = β0 + β1 (RM − Rf) + ε. Search for Apple’s reported Beta on the Web and compare it with your estimate.
2. At the 5% significance level, is the stock return for Apple riskier than that of the market? At the 5% significance level, do abnormal returns exist? Explain.
3. Use a residual plot to analyze the potential problem of correlated observations.
Apple Inc. has established a unique reputation in the consumer electronics industry with its development of products such as the iPod, the iPhone, and the iPad. As of May 2010, Apple had surpassed Microsoft as the most valuable company in the world (The New York Times, May 26, 2010). Michael Gomez is a stock analyst and wonders if the return on Apple’s stock is best modeled using the CAPM model. He collects five years of monthly data, a portion of which is shown in the accompanying table.
