Collect data on the closing stock prices of Alcoa (AA) and IBM (IBM) for the last three months (a possible source is Yahoo!Finance). Input them in EXCEL and do the following analyses (you might also...

Collect data on the closing stock prices of Alcoa (AA) and IBM (IBM) for the last three months (a possible source is Yahoo!Finance). Input them in EXCEL and do the following analyses (you might also want to read the appendix to this chapter): a. Compute the rates of return, variances, and standard deviations of each stock and interpret their values.