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Summary: The penalty for size in small-cap investing is real and getting worse. It surfaces the moment you watch a single fund grow, and the hard truth is that most of today's giants earned their finest returns before they were giants.
When the SBI Small Cap Fund had about Rs 792 crore in assets, it beat its benchmark by roughly 17 percentage points per year on a three-year rolling return basis. Today, about 47 times that size, it cannot keep pace with it. Same manager. The only thing that changed was the size of the fund, and that was enough.
SBI’s small cap fund is not an isolated case. Track any small-cap fund against its own assets over the past decade, and the same pattern appears again and again: the alpha — the return earned over and above the Nifty Smallcap 250 — holds while the fund was small and significantly shrinks as the fund gains size. Nippon, DSP, Kotak and Axis all delivered their best years when they were lean and their worst once they were large. Quant is the apparent exception. Measured from its Rs 1 crore infancy its alpha looks to have risen, but it in fact peaked near 30 when the fund was about Rs 3,000 crore, and has fallen as assets grew tenfold since. The pattern holds, only our starting point flatters it.
How the top 5 small-cap funds stack as they grew big
Barring one, all other stalwarts' alpha shrank significantly in a decade
| Fund | AUM grew from → (in Rs crore) | Alpha then → Alpha now |
|---|---|---|
| Nippon India | 6,542 → 72,673 | 17.7 → 0.2 |
| HDFC | 951 → 38,168 | -1.1 → −4.5 |
| SBI | 792 → 37,141 | 17.5 → −6.9 |
| Quant | 1 → 30,373 | -9.2 → −0.6 |
| Axis | 304 → 27,364 | 2.8 → −2.8 |
| Data considered from January 2016 to April 2026. Alpha represents the fund's excess returns relative to the Nifty Smallcap 250 index over a three-year period. | ||
This is the unforgiving arithmetic of small-cap investing. The very approach that makes a small fund brilliant is the one a large fund can never run. So before you trust a fund's reputation, ask the question that actually matters: where does it sit on this curve, and are the returns that made its name still reaching the money you put in today?
The first reason: A position you cannot reverse
Why does size devour returns? The first reason is the one a small-cap manager wrestles with every single day — liquidity.
SEBI now mandates every small-cap fund (and mid-cap fund) to disclose how long it would take to sell its portfolio if under stress. The numbers are damning. SBI would need about 65 days to offload even half its book. DSP needs 52. HDFC, 51. ITI, a small fund, needs a single day.
Sixty-five days is a quarter of the trading year. In a sharp sell-off, a fund that takes that long to shed even half its book cannot get out of the way, by the time it has sold, the prices it is selling into have already collapsed. The investor wears the entire drawdown.
AMFI’s stress test data across the board
Large funds with high small-cap allocation poses a risk to the portfolio
| Fund | AUM (in Rs crore) | Small-cap allocation (in per cent) | Days to sell half the portfolio |
|---|---|---|---|
| Nippon India | 72,673 | 73 | 29 |
| HDFC | 38,168 | 83 | 51 |
| SBI | 37,141 | 95 | 65 |
| Quant | 30,374 | 71 | 65 |
| Axis | 27,364 | 78 | 23 |
| Bandhan | 25,346 | 78 | 14 |
| DSP | 17,906 | 95 | 52 |
| Kotak | 17,417 | 81 | 39 |
| Tata | 11,330 | 92 | 48 |
| Invesco | 11,038 | 67 | 12 |
| ITI | 2,937 | 71 | 1 |
| Based on the AMFI stress test disclosure for April 2026 | |||
The reason is simple. A small company's shares trade in dribs and drabs. A fund running a few hundred crores slips in and out without leaving a mark. A fund running Rs 37,000 crore shoves the price up as it buys and drives it down as it sells. The larger the fund, the bigger the stake it must hold for that stake to count, and the harder that stake is to escape. In a rising market, this slowly bleeds returns. In a falling one, when the manager most needs to move, the holding becomes a cage. The investor takes on the full violence of a small-cap crash and forfeits the very nimbleness that was supposed to reward the risk.
But size is only half the story. Nippon is the largest fund of all and still clears half its book in 29 days — faster than SBI, DSP or Tata, none of them even half its size. Their asset size, along with their small-cap exposure, shows the complete picture, and that is where the real trap is sprung.
The second reason: The pond is too small
The second reason is structural. India has only so many small companies worth owning, and a large fund runs through them fast.
To hold a position that counts — 1 per cent of the fund — in a Rs 500 crore company, a Rs 40,000 crore fund would have to buy the entire company. It cannot. So it is forced to compromise, and every compromise extracts a price. It can scatter the money across a long tail of holdings like Nippon and Bandhan, which own 247 and 251 stocks, respectively, while staying liquid, thereby diluting the handful of high-conviction bets that drive real outperformance. Or it can stay concentrated in fewer names and surrender the ability to trade them.
Size limits consistency more than it limits returns
Make no mistake, the giants still make money. Nippon, Quant and Bandhan all sit in positive territory over a three- and five-year return basis, and Bandhan tops the entire category. Size shapes the odds without dictating the outcome: it simply shrinks the range of what a fund can attempt. A genuinely skilled manager, or one who wrestles scale into submission, can still win from a large base. Nippon has done it by cutting concentration; Bandhan has done it through stock-picking sharp enough to carry 251 names.
There is honest context here, too. Small caps as a class ran red-hot in the years these funds were small and have since cooled, so part of the fading alpha owes as much to the cycle as to size. What pins the blame back on size is the gradient — the largest funds faded the hardest, while several that stayed small kept their edge intact.
What it means for your money
Large small-cap funds carry size risk, but risk alone is no reason to reject them. What separates a good fund from a trapped one is how it manages that risk, and you can read the answer in three numbers. Watch the small-cap allocation made by the fund manager, is he letting it drift toward the ceiling, or holding it where the book can still be traded? Read the days-to-liquidate from the AMFI stress test. The longer this number, the more of the next crash the fund is forced to absorb. And follow the three-year and five-year alpha against the Nifty Smallcap 250 as the assets have grown, not just where it sits today. A moderately large fund that clears all three is the one still worth owning.
Also read: Small-cap funds reopen. Don't mistake this for a buy signal.
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