Alpha measures the difference between an investment's expected returns based on its beta and its actual returns. A positive alpha indicates the investment has performed better than its beta would predict. A negative alpha indicates an investment has underperformed, given the investment's beta.
Beta measures an investment's sensitivity to market movements. A beta greater than one indicates the investment is more volatile than the market. If beta is less than one, the investment is less risky than the market.
R-Squared reflects the percentage of an investment's movements that are explained by movements in its benchmark index. A higher R-squared indicates a more useful beta figure. A lower R-squared (less than 70%) is less relevant to the investment's performance.