A stock has a beta of 1.15, the expected return on the market is 10.3 percent, and the risk-free rate is 3.1 percent. What must the expected return on this stock be?

The expected return on this stock is 11.38%.

Explanation:

We apply the Capital Asset Pricing Model (CAPM) to solve the problem.

Under the CAPM, we have:

Return on a stock = Risk-free rate + Beta * (Return on Market - Risk free rate).

in which:

Risk-free rate is given at 3.1%;

Beta is given at 1.15;

Return on Market is given at 10.3%;

So:

Return on a stock = Risk-free rate + Beta * (Return on Market - Risk free rate) = 3.1% + 1.15 * (10.3% - 3.1%) = 11.38%.

Thus, the answer is 11.38%.