Alpha

A measure of an investment's return above (or below) what would be expected given its level of market risk — the value added by skill or strategy beyond passive market exposure.

Alpha is the intercept in the CAPM regression that produces beta. It represents returns that cannot be explained by the market's movement — the "extra" return from skill, information, or strategy. Positive alpha means the investment outperformed on a risk-adjusted basis; negative alpha means it underperformed relative to what its beta would have predicted.

Generating consistent positive alpha — outperforming the market after adjusting for risk — is the stated goal of every active fund manager. In practice, the vast majority of actively managed funds deliver negative alpha net of fees over long periods, which is the primary empirical argument for passive index investing. Studies consistently show that roughly 85–90% of active managers underperform their benchmark after fees over any 10-year period.

Alpha can also refer more loosely to any portfolio return above a chosen benchmark, regardless of risk adjustment. In this looser sense, "generating alpha" simply means beating the market. Factor-based or "smart beta" strategies blur the distinction: a value or momentum strategy systematically harvests documented return premiums, which may appear as alpha in a simple CAPM framework but is actually exposure to known risk factors.

This definition is for informational and educational purposes only. Nothing on Finance Compass constitutes financial, investment, or trading advice. Always conduct your own research and consult a qualified professional before making financial decisions.