Micro-cap funds: the riskiest edge of Indian equity

Start with the thing nobody selling you one will lead with: SEBI does not have a micro-cap category. There is no rulebook definition, no mandated minimum allocation, no AMFI band. “Micro cap” is a marketing term for the territory below the small-cap floor, and the absence of a definition is the first thing you are taking on.

Where the ground actually ends

AMFI ranks every listed company by full market capitalisation twice a year, and SEBI's categories cut that list in three: the top 100 are large cap, 101 to 250 are mid cap, and 251 onwards is small cap — with no lower bound at all.

That last phrase is the whole story. A “small cap” fund's universe runs from the 251st-largest company in India down to the 4,000th, and those two ends have almost nothing in common. The 300th company is a real business with analyst coverage and daily volume. The 2,500th may trade a few lakh rupees a day and have one person writing about it.

Micro cap is the bottom of that range. In practice it means companies ranked roughly 500 and below, and it is accessed in India through:

• Index funds and ETFs tracking a microcap index, which selects by rank and liquidity screens rather than by judgement;
• Small-cap funds that run deep, holding a long tail well past rank 500 inside the small-cap 65% floor;
• Thematic or “opportunities” schemes with mandates loose enough to go there.

Only the first tells you honestly what you are buying. For the other two you have to read the portfolio.

What you are actually paid to bear

The pitch is that inefficiency lives here: less coverage, less institutional ownership, therefore more mispricing for a diligent manager to exploit. There is real substance to that. There is also a bill.

Liquidity is the binding constraint, not volatility. A micro-cap holding can take days to exit without moving its own price. That is tolerable while money is flowing in. It becomes the entire problem when money is flowing out, because a fund facing redemptions must sell something — and if the micro caps cannot be sold at a sane price, it sells the liquid holdings first, leaving the remaining unitholders with a portfolio that is now more concentrated in the illiquid names. Redemption pressure concentrates risk onto the people who stayed.

Drawdowns are deeper and slower to mend. Broad Indian small-cap indices have fallen more than 50% from peak inside a single cycle and taken years to recover; the micro-cap tail falls further and recovers later, because the buyers who return to a market return to the liquid end of it first. Check the maximum drawdown figure before you check the return.

Business risk is genuinely different. Below a certain size, a company is often one customer, one promoter, or one plant. Corporate-governance failures, promoter pledging and related-party surprises are concentrated in this end of the market, and a fund manager's diligence reduces that risk without removing it.

Capacity works against you. A strategy that worked at ₹300 crore of assets may be unrunnable at ₹8,000 crore, because the positions that generated the return cannot be built at that size. Rising AUM in a micro-cap strategy is a warning, not a validation — watch AUM alongside the return.

⚠️ SEBI has periodically required AMCs to disclose stress-test results for small- and mid-cap schemes — an estimate of how many days it would take to liquidate a quarter and a half of the portfolio. Where a fund publishes it, read it. It is the most honest number on the factsheet.

If you still want the exposure

• Size it as a satellite you can watch halve. Somewhere in the region of 5–10% of the equity allocation, sitting on a diversified core, is the shape that survives a bad cycle.
• Use a SIP, and understand what it does and does not fix. Rupee-cost averaging genuinely helps here because the price swings are wide — but it depends on a recovery, and it does not diversify a concentrated bet.
• Check the tail, not the headline. Open the portfolio and look at what the smallest 20 holdings are, and what fraction of assets sits in names that trade thinly. A “small cap” fund holding mostly rank 260–400 companies is a different product from one holding rank 800–2,000.
• Give it a full cycle. Under five years, you have measured a market regime, not a strategy. Read rolling returns rather than a trailing three-year number.
• Decide the exit before you enter. The narrative that gets you in will still be available when it stops working.

Pitfalls to avoid

• Buying after the run. Money arrives in micro cap after three good years, which is structurally the worst moment — the inefficiency premium is largest when nobody wants the asset.
• Reading “high return” as “high skill”. Over a small-cap bull run the entire category rises; separating manager skill from the tailwind needs the information ratio and a full cycle, not a league table.
• Ignoring the exit door. Ask how you would redeem ₹20 lakh from this fund in a week when everyone else is redeeming. The answer is the risk.
• Assuming your small-cap fund isn't already here. Many are. Check before you add a second dose of the same exposure — overlap is the quiet way portfolios become concentrated.
• Treating a young track record as evidence. A three-year-old micro-cap fund launched into a rising market has told you nothing about how it behaves when the market falls.

Key takeaway

Micro cap is not a SEBI category, and that is the point: you are buying the undefined tail below the small-cap floor, where the extra return is compensation for illiquidity and business fragility rather than volatility alone. It can genuinely add to a portfolio as a small, deliberately sized satellite held across a full cycle — and it reliably destroys money when it is bought after a good run, sized like a core holding, and sold in the drawdown that follows. Read the liquidity disclosure before you read the return.