Indifference curve

Indifference curve (expected return vs Expected risk):
For investors, return and risk were the key objectives. An investor's risk profile is illustrated with indifference curves. The optimal portfolio, then, is the point on the efficient frontier that is tangential to the investor's highest indifference curve.

Steep indifference curve=> convervative investor;
Flatter indifference curve=>less risk averse investor
Higher curve =>greater utility; more utility is preferable