- What a Return Actually Measures
- Factor 1: The Risk Behind the 67.9%
- Factor 2: Why does the Same Fund's Return Change Depending on when you look
- Things to keep in mind
- Conclusion
In mid-2024, Quant Small Cap Fund's one-year return touched 67.9%. That kind of number gets a fund onto every "best funds" list. Money poured in.
India's market regulator, SEBI, opened an investigation into the fund house over front-running, a practice where someone trades ahead of the fund's own orders using inside knowledge, to profit personally. As of now, the same fund's one-year return has come down to around 9.37%.
Same fund. Three very different numbers, depending on what you check and when. That gap is what this blog is about.
What a Return Actually Measures
A fund's return tells you how much its NAV, the price of one unit of the fund, went up or down over a chosen period. That's all it tells you. It does not tell you how much risk the fund took to get there, or whether the period you're looking at happens to be a lucky or unlucky one to measure.
Two things hide behind a return number: the risk taken to earn it, and the time window used to measure it. We'll go through both, using the same Quant Small Cap Fund example.
Factor 1: The Risk Behind the 67.9%
Small-cap funds invest in smaller, less established companies. These companies can grow fast, but their stock prices also swing harder in both directions than large, established companies. During market corrections in 2022 and 2024, small-cap funds as a category fell 30%, while large-cap funds fell only 15-20% in the same periods. So a small-cap fund's high return is not surprising on its own; it comes from a category that takes on more risk to begin with.
This is where risk-adjusted return becomes useful. It asks a simple question: how much return did the fund earn for the amount of risk it took? One common way to measure this is the Sharpe ratio. It takes the fund's return above a safe option (like a fixed deposit), and divides it by how much the fund's returns moved up and down, its volatility. A higher Sharpe ratio means the fund earned more for each unit of risk it took. A lower one means it took a lot of risk for the return it delivered.
Quant Small Cap Fund's published Sharpe ratio is around 0.88, with a standard deviation of about 20.5%. In plain words, even with a headline return as high as 67.9%, the fund was not paid very efficiently for the risk it carried. The return looked big, but a large part of it came from taking on volatility, not from skilful, efficient management.
Factor 2: Why does the Same Fund's Return Change Depending on when you look
A trailing return is the simplest kind of return: pick a start date, pick an end date, and measure the change in between. It's what you see on most fund pages, the 1-year, 3-year, 5-year numbers.
The problem with a trailing return is that it depends entirely on which two dates you picked. Quant Small Cap Fund's 3-year trailing return measured in mid-2024 was 67.9%, because that window happened to capture a strong rally. The same fund's 3-year trailing return measured today is around 12.05%, because today's window captures a much quieter year. Neither number is wrong. They're just measuring different stretches of time for the same fund.
A rolling return tries to fix this. Instead of picking one window, it measures the same length of time, say, one year, starting from every single day over a longer history, then looks at all those results together. So instead of one 3-year return, you get hundreds of 3-year returns, each starting a day later than the last. Looking at all of them together tells you how the fund has actually behaved across many different starting points, not just the one window that happened to be reported.
Things to keep in mind
Every mutual fund document carries a line saying past performance does not guarantee future returns. This is exactly the situation that the line is warning about: a fund's past number, however large, does not promise the same number again.
High-risk, high-volatility categories like small-cap funds are not automatically bad investments. But the headline return only tells half the story. The other half is whether you, as an investor, can sit through a 30% fall without panicking and exiting at the wrong time, because that fall is the real cost behind a high return number.
Conclusion
The same fund can look outstanding or unremarkable depending on which number you check and which time window you check it over. Before a headline return decides anything for you, look at how much risk it took to earn that number, and whether the window being shown to you is the full picture or just the convenient part of it.