Index Funds vs ETFs vs Active, The Evidence in India

The question every Indian investor eventually asks: should I pay a fund manager to pick stocks, or just buy the index? The evidence on that question is about as consistent as anything in finance, and the industry still markets active funds hard, because active fees are many times passive ones.

Here is the evidence, the arithmetic behind it, the narrow places where active management has a better case, and where rules based strategies sit, which is neither simply passive nor active.

The evidence on active funds

Independent scorecards that compare Indian active funds with their benchmarks have been published twice a year for more than a decade. Their pattern barely changes: over five and ten years, after fees, most active large cap funds in India have lagged their benchmark index, and the share that lags tends to rise as the horizon lengthens. Funds that beat the index in one period are, on the whole, not the same funds that beat it in the next. Performance persistence is weak.

You can check this yourself without trusting anyone's scorecard. SEBI requires every scheme to show its return next to its benchmark's Total Return Index in the factsheet and on AMFI's website. Pick your own fund, pick five and ten years, compare the direct plan's return with the TRI, and count.

Why active underperforms: the arithmetic

William Sharpe set out the argument in 1991, and it needs no data at all. Before costs, the average actively managed rupee must earn the market return, because active managers together own the market. After costs, the average active rupee must lag the market by exactly its costs. It is not a claim about skill. It is accounting.

For an active fund in its direct plan to match the index fund here, the manager must beat the index by about 0.8 percentage points every year, before you get anything for the extra risk of being different. In the regular plan, it is about 1.6 points every year for 20 years. A few managers do that. Picking them in advance is the hard part.

Index fund or ETF?

For a monthly SIP into a broad index, an index fund's direct plan is usually the simplest choice: no spread, no premium, no order to place. For a larger lump sum into a liquid ETF, the lower expense ratio can win, provided you buy near the iNAV. Module 6.4 shows how to check that.

1. Pick the indexBroad and liquid first; the index matters more than the fund.
2. Compare costsDirect plan expense ratio, or ETF expense ratio plus spread.
3. Check trackingTracking difference over one and three years against the TRI.
4. Check liquidityFor ETFs, daily traded value and the gap to iNAV.
5. AutomateA monthly SIP or a fixed rebalance date, then leave it.

What you actually own in an index

Passive does not mean neutral. The Nifty 50 weights its 50 companies by free float market capitalisation, so the largest names carry the most money, and NSE reviews the constituents twice a year. When you buy the index you buy its sector mix and its valuation at that moment, whatever they are.

Valuation moves a lot even inside a short window. The Nifty 50's price to earnings ratio was 23.3 on 7 October 2024 and 19.3 on 9 October 2026, with a low of about 19.0 in between, on NSE's published index data. Same index, about a sixth cheaper on earnings two years later. An index fund removes the manager from the decision; it does not remove the price you pay. That is why many investors pair an index core with a steady SIP: the monthly amount buys more units when the index is cheaper and fewer when it is dearer.

When might active win? The narrow cases

The case against active management is strongest in large cap Indian equity, the most researched and most liquid part of the market. It is somewhat better in:

• Mid and small caps: less analyst coverage, wider information gaps and more mispricing. A skilled manager has more room, although benchmarks in these segments are also harder to trade cheaply.
• Credit: corporate bond analysis is specialised, and a careful credit team can add value, or avoid losses, in ways an index cannot.
• Specialist strategies: special situations, deep value and concentrated mandates that no index replicates.

The honest summary: in large caps, the index is very hard to beat after costs; elsewhere the evidence is less one sided, but the cost hurdle never goes away.

Where rules based investing sits: the third option

Systematic strategies are neither passive nor active in the usual sense:

Worked example: a core and satellite portfolio

A common structure blends the three. Take ₹20 lakh: ₹12 lakh in a Nifty 50 index fund as the core, ₹5 lakh in a rules based factor strategy, ₹3 lakh in one active mid cap fund you have researched. At the example costs above, the yearly fee bill is about ₹2,400 on the core and ₹3,000 on the active fund. The factor sleeve's cost depends on how often it trades; at 0.2% of traded value it is charged only on rebalances. The core keeps you at the market's return; the satellites are where you accept tracking error in the hope of more. Size the satellites so that their worst year does not make you abandon the core.

Common mistake: choosing funds on last year's return

The common mistake is buying last year's top fund. Rankings churn, and a top quartile year says little about the next one. Investors who chase the leaders tend to buy after the good run and sell after the bad one, which is the exact opposite of what compounding needs.

The second mistake is paying active fees for an index. Compare your active fund's top holdings and sector weights with its benchmark. If they look nearly the same, you are paying active fees for a closet index fund.

How this shows up in RupeeCase

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