刘同学2018-05-18 17:22:51

Which of the following statements regarding the covariance of rates of return is least accurate? A If the covariance is negative, the rates of return on two investments will always move in different directions relative to their means. B It is a measure of the degree to which two variables move together over time. C It is not a very useful measure of the strength of the relationship, there is absent information about the volatility of the two variables. 这题a是对的呀，题干问不对的