The security market line can be described as the o investment opportunity set formed with two risky assets. O line on which all securities have the same price per unit of the risk. line whose slope is the Sharpe ratio of a risky asset. investment opportunity set formed with a risky asset and a risk-free asset. line on which lie all portfolios that offer the same utility to a particular investor. O line on which lie all portfolios with the same expected rate of return and different standard deviations