Assume the annual volatility of the market is 30% and a stock';s annual volatility is 50%. The beta of the stock is 1.5. What are the correlation and covariance, respectively, between the stock and the market?
　　Correlation             Covariance
　　A.     0.9                    0.135
　　B.     0.135                  0.9
　　C.     0.9                    Cannot be determined with the information given
　　D.     0.135                  Cannot be determined with the information given
　　Answer: A
　　Explanation:
　　相關(guān)知識(shí)點(diǎn)：Covariance and Correlation
　　Covariance is the expected value of the product of the deviations of two random variables from their respective expected values.