SIP Math Behind India's Mutual Fund Mismatch: Are Investors Chasing the Wrong Returns?

Despite the turbulence caused by the West Asia crisis and macroeconomic uncertainties, India's mutual fund industry continued to attract record levels of retail money in May. However, a striking contradiction has emerged between where investors are pouring their money and where returns are actually being generated. Some of the least-subscribed fund categories, such as small-cap and micro-cap funds, outperformed the industry's most popular bets, including mid-cap and large-cap funds, in May.

Micro-cap mutual funds and small-cap mutual funds gave the highest returns of around 5.7% and 3.4% in May 206, while the large-cap mutual funds delivered less than 1.5% return, revealed Vallum Capital in its Monthly Macro Grid Chartbook. As per the report, India's mutual fund industry held firm at Rs. 81.58 lakh crore in assets as of May 31, 2026, and equity funds recorded their 63rd consecutive month of net positive inflow, with the lowest invested micro caps giving the highest returns

The Cap Wise Analysis Says It All- Highest Returning Funds Got The Least Money

Within domestic equity, May produced one of the clearest disconnects between return and flow this year. Micro-cap funds were the month's best performer, gaining 5.7%. Small-cap funds returned 3.4%, the second-best showing across all cap categories and drew Rs. 2,229 crore. Mid-cap funds delivered 1.6% returns and collected Rs. 3,898 crore. Large-cap funds, however, returned just 1.5% which is the weakest monthly return, and pulled in Rs. 8,565 crore, nearly four times what small-caps received and more than double mid-caps. Flexi-cap funds, which delivered 2.1%, drew Rs 5,350 crore, while Large and Mid-cap funds collected Rs 2,617 crore at 1.9%.

Why Investors Are Chasing Wrong Returns? It's SIP Mathematics

The unambiguous pattern of 'lower return, more flows' is due to the growing trend of Systematic Investment Planning (SIP). Monthly standing instructions on large caps and flexi cap index trackers mechanically route the bulk of retail savings toward the largest funds, as per the report. The SIP trend continues regardless of the monthly performance of funds across categories.

What is SIP?

The SIP is a disciplined method of investing a fixed amount of money at regular intervals (e.g., monthly, weekly) into a mutual fund. Instead of a large, one-time lump sum, it allows you to build wealth gradually with small contributions. In the micro-cap context, the SIP calculation measures safer capitalisation to invest rather than higher returns, and in May, when micro-caps showed higher returns, it made investors think twice.

BFSI Funds Lead the Race

BFSI led this by returning 5.5% for the month, attracting Rs. 1,013 crore. Where PSU Banks gained 6.9%, drew a net flow of Rs. 436 crore, Private Banks funds gained 6.5% and collected Rs. 329 crore together drawing Rs. 765 crore; further, Broad basket Bank funds returned the same 6.5% as private banks and simultaneously saw Rs. 421 crore in redemption. Investors are actively rewarding targeted exposure and penalising category breadth at identical return levels.