Alpha

Alpha answers the question that justifies every rupee of active mutual-fund fees in India: did the fund manager actually add skill, or did they just ride a rising market? When the Nifty roars, almost every equity fund makes money, but that is beta, the return from simply being in the market. Alpha is what is left after stripping out that market move and the risk taken to capture it.

How to read it

If a large-cap fund returns 14% while its benchmark, say the Nifty 100 TRI, returns 12% for the same level of risk, the roughly 2% of outperformance is alpha. Positive alpha means the manager's stock selection and timing genuinely beat the index; negative alpha means an investor would have been better off in a cheap index fund. Importantly, alpha is risk-adjusted, so a fund that beat its benchmark only by taking wildly more risk is not generating true alpha, merely more beta in disguise.

Why it is getting harder in India

For years, Indian active managers, especially in mid- and small-caps, comfortably beat their benchmarks. But as markets deepen and information spreads faster, consistent alpha in the large-cap space has become elusive. SEBI's move to compare funds against Total Return Indices (TRI), which include dividends, raised the bar and exposed how many funds were beating only a price index. This is a major reason index funds and ETFs have grown rapidly.

The verdict

Use alpha to judge whether you are paying active fees for active value. Look at it over full market cycles of five years or more, not a single hot year, and alongside measures like the Sharpe ratio and consistency. If a fund cannot reliably deliver positive alpha after its expense ratio, a low-cost index fund is the rational default. Alpha is the proof of skill, and in an increasingly efficient market, that proof is worth demanding.