Index Funds, ETFs or Active Funds: Where Should Investors Allocate Today?

Before the active versus passive debate, there's a simpler distinction that investors often skip: index funds versus ETFs (exchange-traded funds). Both track the same benchmark, but the mechanics differ.

Index fund units are bought and sold through the mutual fund house at the end-of-day NAV; ETF units trade on the exchange throughout the day, like a stock. ETFs are typically a shade cheaper on expense ratio, but that saving only holds if the ETF is genuinely liquid.

“Trading volume matters here in a way it doesn't for index funds, because a thinly-traded ETF can see its market price drift away from its intraday NAV (iNAV). The wider that gap, the riskier the trade: you could end up buying above fair value or selling below it, quietly giving back the cost advantage ETFs are supposed to offer,” says Rajani Tandale, SVP – Mutual Fund & Partner at 1 Finance.

The practical rule: if you can't check an ETF's trading volume and iNAV spread before buying, the index fund is the safer default.

The Bigger Question - Active Vs Passive

The debate has moved from theory to arithmetic, and the numbers, tracked over decades by S&P's SPIVA Scorecard, are stark. Over a 20-year period, 92 per cent of U.S. large-cap active funds underperformed the S&P 500 after fees, with underperformance climbing steadily the longer you hold, 94 per cent for mid-cap, 93 per cent for small-cap, 91 per cent for international equity.

“This isn't really a mystery, it's math. Active and passive investors together own the whole market. So, before costs, the average active dollar must earn exactly the market return; after fees, active management underperforms by roughly what it charges. The SPIVA India Score card also showcases the same story 70 per cent to 80 per cent underperformance in large-cap, ELSS, midcap and smallcap. So, shrinking of alpha generation is not just India’s problem,” informs Tandale.

India's own data, tracked quarterly by 1 Finance Magazine, tells a more textured version of the same story. On trailing 5-year returns, large-cap regular plans have underperformed their benchmark at rates as high as 92 per cent (March 2023) and were still running 50-56 per cent as of mid-2026, consistently 15-25 percentage points worse than direct plans of the identical scheme in the same quarter. That gap is pure distributor-commission drag, and it's the cleanest real-world illustration of the SPIVA arithmetic at work: same fund manager, same stock picks, different fee load, dramatically different odds of beating the index.

The 10-year numbers are more damning still. Mid-cap regular plans hit 100 per cent underperformance across all four quarters of 2025, literally every mid-cap regular-plan fund with a decade-long track record failed to beat its benchmark. Large-cap regular plans weren't far behind, at 83-87 per cent.

One genuine nuance pushes back against the "passive always wins" headline: small-cap direct plans. Over 10 years, their underperformance has run as low as 8-15 per cent through 2025-26, meaning most small-cap direct funds have actually beaten their benchmark over a decade, even as small-cap regular plans (23-31 per cent) and every large/mid-cap category told the opposite story.

“This tracks with the standard explanation - thinner analyst coverage in small-caps leaves more room for genuine research edge. But that edge is only realised if an investor actually stays put for the full decade. In practice, most don't: a couple of years of underperformance or a sharp drawdown is usually enough to trigger a switch, and that behaviour gap quietly erases whatever edge the fund might have delivered to a patient holder,” says Tandale.

Even large-cap direct plans show how noisy this can get short-term - underperformance swung from a low of 25 per cent (March 2024) to a high of 60 per cent (March 2025) within a single year, a reminder that even a broadly "efficient" category doesn't move in a smooth, one-way line.

That is really the crux of it: plenty of active funds may well be good managers in the long run. But underperformance, even for a few years, occupies real mental space, and that's precisely when investors give up on the fund. “The risk of switching funds repeatedly, chasing whoever looks good this year, is usually a far more costly mistake than the no-alpha generation with index funds. Passive doesn't just remove the fee drag; it removes the temptation to switch in the first place,” says Tandale.