Which of these is a measure of risk to reward earned by an investment over a specific period of time?
a. coefficient of variation
b. market deviation
c. standard deviation
d. total variation

The correct answer is A. Coefficient of variation.

Explanation:

Coefficient of variation is the risk of an asset or portfolio per unit of return.

Coefficient of variation = Standard deviation/ Return

Lower the coefficient, better it is.

If portfolio have same return but different risk or same risk but different return then inventor will prefer portfolio with

If portfolio have different returns with different risks, then protfolio with lower coefficient of variation is preferred.

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