Alpha in mutual funds: did the manager add value?

Alpha measures how much extra return a fund earned compared with its benchmark, after adjusting for the risk it took. It's the closest single number to "did the fund manager add value?" — the return that skill (or luck) produced beyond what the market handed out for free.

How to read it

• Positive alpha (e.g. +2%) — the fund beat its benchmark by 2 percentage points more than its risk profile would predict. Genuine value added.
• Zero alpha — the fund delivered exactly what the market gave for that level of risk. You could have had this from an index fund, cheaper.
• Negative alpha — the fund underperformed for the risk taken; fees and poor calls subtracted value.

Why "after adjusting for risk" matters

Alpha is not simply fund return minus index return. A fund with a beta of 1.2 in a market that rose 10% should have returned about 12% just by being more aggressive — only returns beyond that count as alpha. Example: benchmark up 10%, fund beta 1.2, fund returned 15% → expected return ≈ 12%, so alpha ≈ +3%. Conversely, a high-beta fund that returned 12% in that market earned zero alpha — it just took more risk. This is what separates skill from leverage-by-another-name.

The catches

• Alpha is backward-looking and doesn't persist reliably — India's SPIVA scorecards show most large-cap active funds deliver negative alpha after fees over 5–10 years, and past positive alpha is a weak predictor of future alpha.
• It depends on the benchmark. Alpha computed against the wrong index (or a price index instead of TRI) flatters the fund.
• Fees eat alpha directly — a manager generating 1.5% of gross alpha in a fund charging 1.5% leaves you nothing. Cheap index funds target zero alpha at near-zero cost, which is precisely why they're hard to beat.

Where alpha still earns its keep

Alpha is most meaningful in less-efficient corners — mid-cap and small-cap — where research coverage is thin and skilled managers have more room. Look for alpha that's positive across multiple periods, paired with a healthy information ratio showing it was earned consistently rather than in one lucky year. A practical screen: shortlist funds whose alpha is positive over both 3 and 5 years, then check that the outperformance didn't come with runaway beta — steady, moderate alpha repeated over years compounds into a far bigger edge than one spectacular season followed by reversion.

→ See a fund's alpha, and the vs-benchmark NAV chart, on its detail page.