Question B (20 points) Consider the monthly stock returns of the Coca-Cola Company (KO) from January 1961 to September 2011

Question B (20 points) Consider the monthly stock returns of the Coca-Cola Company (KO) from January 1961 to September 2011. The simple returns are available from CRSP and in the file m-ko-6111 . t xt. Transform the simple returns to log returns. Is the expected monthly log return zero? Is there any serial correlation in the log returns? Is there any ARCH effect in the log returns? 

Question C (20 points) Use the S&P 500 index to represent the US Market. Obtain the time-varying betas for the Abbott Laboratories stock. The sample period is from January 2, 2001 to December 31, 2010. The data are available from CRSP or Yahoo Finance, or the file d-abtsp-0110.txt.