Why a Fund's Past 1-Year Return Isn't the Full Picture

Academic research on Indian equity mutual funds has found that funds show no persistence in their performance over time, a result that holds up regardless of which performance measure or time horizon is used (Value Research, 2026). Some studies do find short-term persistence at a one-year horizon, but that edge disappears over longer periods, which happens to be the horizon that actually builds wealth (Value Research, 2026).

Key Takeaways

• A one-year return depends heavily on when it starts and ends. A sharp rally can flatter the number, and a weak phase can unfairly depress it (Value Research, 2026).

• A fund topping the one-year chart tells you about last year's market phase, not about the manager's repeatable skill (Value Research, 2026).

• Rolling returns test performance across many overlapping windows instead of one fixed start and end date, which removes timing bias from the picture (Tata Mutual Fund, 2026).

• A five-year rolling return win rate against the benchmark is a more reliable signal than a single standout year (Value Research, 2026).

• Two funds can post similar long-term returns while taking very different paths to get there, and standard deviation is what separates a smooth ride from a bumpy one (Value Research, 2026).

What a One-Year Return Actually Measures

A one-year return has exactly two data points: where the fund started and where it ended, twelve months apart. Point-to-point return can be misleading whenever the chosen start or end date happens to capture an unusual market event, a rally, a crash, or a recovery already underway (HeyGoTrade, 2026).

That means a fund's one-year number says as much about the calendar as it does about the fund. A fund launched or measured right before a rebound looks brilliant. The same fund measured a few months earlier or later, through a rougher stretch, can look mediocre, without anything about the fund's actual management changing at all.

The Experiment: Buying Last Year's Best Fund

Value Research ran a direct test of this idea. Researchers simulated putting ₹10 lakh into the previous year's best-performing flexi-cap fund at the start of each year from 2016 to 2025, switching to a new "winner" every twelve months (Value Research, 2026). The point was to see whether chasing the top of the one-year leaderboard, year after year, actually pays off.

The practical conclusion drawn from that test was direct: a fund topping the one-year chart reflects last year's market phase, not a manager's repeatable skill, and a five-year rolling return win rate against the benchmark is the more trustworthy signal (Value Research, 2026). Chasing yesterday's winner is a bet on recency, not on consistency.

Why Rolling Returns Tell a Different Story

Rolling returns measure a fund's performance across many overlapping periods instead of one fixed window, which reduces the influence of any single lucky or unlucky starting point (Tata Mutual Fund, 2026). Instead of checking returns from January 2020 to January 2025 alone, rolling returns calculate performance for every possible five-year window inside that stretch, revealing whether strong results held up across cycles or were limited to a few favourable years (Value Research, 2026).

This distinction matters because a normal return depends on one start date and one end date, and a misleading result can appear if either date lands during a market peak or a market fall (Tata Mutual Fund, 2026). Rolling returns spread that risk across dozens of possible entry points instead of resting the whole verdict on one.

A separate analysis found that the annual return, the five-year trailing return, and the five-year rolling return of the very same fund can differ significantly, which shows how much the metric chosen shapes the story an investor ends up believing (Wealth Redefine, 2026).

Recency Bias Is the Real Trap

Investors picking funds purely because they topped last year's return chart are rewarding what worked recently, not what works consistently, and short-term returns ignore far more important factors like performance across market cycles, volatility, and cost (Value Research, 2026). Worse, yesterday's winners often struggle the following year, a pattern that has a name: recency bias (Value Research, 2026).

The instinct is understandable. A chart of trailing one-year returns is the easiest thing to glance at, and the fund sitting at the top of that chart feels like the obvious choice. But that chart mostly reflects which sector or style was in favour over the past twelve months, not which fund manager will keep making good decisions going forward.

What to Look at Instead

Rolling return consistency is the strongest alternative signal. A fund that beats its benchmark across multiple rolling periods and multiple market cycles is showing something a single good year cannot: that its process holds up across different conditions, not just favourable ones (Value Research, 2026).

Standard deviation is worth checking alongside returns, since two funds can arrive at similar long-term numbers through very different journeys, one with sharp swings and one with a steadier climb (Value Research, 2026). A fund that is only ahead because of one exceptional stretch carries a different risk profile than a fund that has been quietly consistent the whole way.

None of this means a one-year number is worthless. A rolling one-year performance view can still work as a quick first look at which direction a set of funds or asset classes has been leaning (Investing.com, 2015). The mistake is treating that quick look as the entire analysis instead of the starting point for one.

Frequently Asked Questions

Does a strong one-year return mean the fund manager is skilled?Not on its own. It often reflects which market phase or sector was in favour over that specific twelve months, more than it reflects the manager's decision-making (Value Research, 2026).

How many years of rolling data should I look at before judging a fund?Five-year rolling return win rates against the benchmark are generally treated as a more dependable signal than any single-year figure (Value Research, 2026).

Is it a mistake to ever look at recent performance?No, a short-term view can be a reasonable starting point for spotting a directional trend, but it should not be the only factor in a decision (Investing.com, 2015).

Why do two funds with similar long-term returns still feel different to hold?Because the path matters as much as the destination. Standard deviation captures how much a fund's returns swing along the way, which is separate from the final number (Value Research, 2026).

This article is for general information and does not constitute investment advice. Mutual fund investments are subject to market risk, read all scheme related documents carefully. Vijay InvestEdge Pvt. Ltd. is an AMFI-registered Mutual Fund Distributor, ARN-1777.

Sources

1. Value Research (2026). Should You Buy Last Year's Best Mutual Fund? We Tested It.

2. Value Research (2026). Stop Chasing 1-yr Fund Returns. Check These 5 Metrics Instead.

3. Tata Mutual Fund (2026). Why "Rolling Returns" Is an Important Metric That Matters in 2026.

4. Wealth Redefine (2026). Why Rolling Returns Are the True Test of Your Mutual Fund's Performance?

5. Investing.com (2015). In Defense of Rolling Return Charts.