Sectoral and thematic funds: high risk, high reward — or just hype?

Sectoral and thematic funds arrive with the best stories in the industry. Defence. Manufacturing. Digital India. Energy transition. The narrative is compelling, the recent returns are usually spectacular, and that combination is precisely the problem.

What they are

A sectoral fund concentrates on one sector — banking, pharma, technology, FMCG. A thematic fund is broader but still narrow: it picks a story and buys whatever fits it, often across several sectors.

Both must hold at least 80% in their stated sector or theme. That is the defining feature and it cuts both ways: the fund cannot diversify away from the thing you bought it for, however bad it gets. A manager who thinks the sector is overvalued has no permission to leave.

These are also the one part of the SEBI rulebook where an AMC may run multiple schemes in the category — which is why fund houses launch so many of them.

The launch cycle nobody escapes

Watch the pattern, because it is remarkably consistent:

1. A sector performs exceptionally for two or three years.
2. Its returns top every league table, and the story becomes obvious in hindsight.
3. Fund houses launch schemes into the demand — an NFO at ₹10 with a compelling narrative.
4. Retail money arrives in size, at the top.
5. The cycle turns. The sector spends years going nowhere while everything else works.
6. Investors exit at the bottom, having captured the drawdown and none of the run.

The launches are a coincident indicator of the peak, not a signal of opportunity. By the time a theme is marketable enough to sell, it has been priced.

Concentration is the actual product

A diversified equity fund can be wrong about a sector and survive. A sectoral fund being wrong about its sector is the whole position.

That produces genuinely extreme outcomes in both directions, and the drawdown history of individual sector categories in India includes multi-year stretches of deep underperformance. You are not being paid a premium for this concentration — you are simply taking more of one risk.

There is a subtler point too: you probably already own it. A diversified fund holds banks. An index fund is heavily weighted to financials because the index is. Adding a banking fund on top does not diversify anything; it doubles a bet you already had. Check the overlap.

When they are defensible

Rarely, and only with conditions attached:

• You have a specific, researched view you can articulate without using the word “growth” — and a reason to think it is not already in the price.
• You size it as a satellite, not a core. A commonly cited ceiling is around 5–10% of the equity allocation, and treating it as money you can watch halve.
• You have a horizon that spans the cycle, because these categories work in multi-year waves and being early is indistinguishable from being wrong for a long time.
• You have decided in advance when you will exit, since the same narrative that got you in will still be available when it stops working.

One legitimate use is deliberate underweight correction — someone whose portfolio structurally lacks exposure to something they believe matters. That is a portfolio decision, not a return chase.

Pitfalls to avoid

• Buying after the run. The returns that attracted you are the reason to be cautious, not the reason to invest.
• Confusing a good sector with a good investment. A wonderful industry bought expensively is a poor holding. Price matters.
• Running a SIP into one and calling it disciplined. Averaging into a concentrated bet does not diversify it — and the benefit depends on a recovery that a structurally declining sector may never deliver.
• Holding four of them. Four thematic funds is not diversification; it is four concentrated bets and a portfolio with no core.
• Forgetting the tax. These are equity-oriented, so exiting a position that worked triggers capital gains — which is precisely when people hesitate and give the gain back.

Key takeaway

Sectoral and thematic funds are the highest-conviction, lowest-diversification products retail investors can buy, and they are marketed hardest at the exact moment they should be avoided. Treat them as a small, deliberately sized satellite around a diversified core, entered on a view rather than on a return table, with an exit decided in advance — or skip the category entirely, which costs you very little and removes a reliable source of regret.