14. Let PAB and AB denote the correlation and covariance between stock A and stock B, re- spectively. Stock A and Stock B have standard deviations of A and B, respectively. Which one of the following equations is incorrect? (a) OAB = (b) PAB (c) JAB PAB OB (d) = PAB JA o (e) None of them are incorrect. (All of them are correct.) = - PAB XOAXOB. AB TAXOB TAXOB. X

14. Let AB and AB denote the correlation and covariance between stock A and stock B, respectively: Stock A and Stock B have standard deviations of A and B, respectively, Which one of the following equations is menreet? (a) AB=MBAB. (c) Q11Qin=1W. (e) None of them are incorrect. (All of them are correct.)