coefficient of variation of returns
Coefficient of Variation. In statistics, the ratio of the standard deviation of a series of data points to the expected return. In investing, the coefficient of variation is used to measure the volatility (represented by the standard deviation) to the expected return on an investment.A lower coefficient of variation indicates a higher expected return with less risk.n investing, the coefficient of variation is used to measure the volatility (represented by the standard deviation) to the expected return on an investment.