Sector & Thematic Funds
What is it?
Sector funds concentrate at least 80% of their portfolio in a single industry — for example, banking, IT, or pharma. Thematic funds invest at least 80% across a broader theme spanning multiple related sectors — for example, an infrastructure theme can include cement, steel, capital goods, construction, ports, and roads companies. Both carry concentration risk, since there's no diversification across unrelated industries the way a diversified equity fund provides.
Why should you care?
Because a sector or thematic fund's fortunes are tied so closely to one industry or theme, a downturn specific to that sector hits the fund far harder than it would hit a diversified equity fund, even if the broader market is doing fine. These funds can deliver exceptional returns during the right cycle for their sector, but the same concentration that drives the upside also drives the downside — most financial planners recommend limiting sector and thematic exposure to a small slice of an overall portfolio, not using them as a core holding.
Real-life example
An IT-sector fund can fall sharply on a global technology slowdown even while the broader market index stays flat, because 100% of its holdings are concentrated in one industry with no exposure to sectors like banking, consumption, or healthcare that might be performing differently at the same time.
Common mistakes
- Over-allocating to a sector or thematic fund right after it has delivered strong recent returns — sector cycles are notoriously difficult to time, and chasing recent performance is a common way investors buy in near a peak.
- Treating a thematic fund as meaningfully diversified just because it spans multiple sectors — a theme like infrastructure is still one concentrated investment thesis, not a substitute for a genuinely diversified equity fund.
- Not having a clear exit plan — because sector cycles can turn quickly, staying invested purely out of inertia after the thesis has played out can give back gains that were hard-won during the up-cycle.
- Using a sector or thematic fund as a core portfolio holding rather than a small satellite allocation on top of a diversified base.
Sector funds vs thematic funds — SEBI-defined minimum concentration
| Sector fund | Thematic fund | |
|---|---|---|
| Minimum concentration | 80%+ in a single industry | 80%+ across a broader multi-sector theme |
| Example | Banking fund, IT fund, Pharma fund | Infrastructure, Consumption, ESG theme |
| Diversification vs. a plain equity fund | Lowest — one industry only | Somewhat broader, but still one thesis |
| Concentration risk vs. diversified equity fund | Higher | Higher |
FAQ
What's the difference between a sector fund and a thematic fund?
SEBI defines both as distinct categories with an 80%+ concentration requirement. A sector fund invests at least 80% in stocks of a single industry (e.g. a banking fund holds mostly banking stocks). A thematic fund invests at least 80% across a broader theme spanning multiple related sectors (e.g. an infrastructure theme spans cement, steel, construction, and more). A thematic fund is somewhat more diversified than a sector fund, but both still carry concentrated exposure to one investment thesis.
Are sector and thematic funds good for long-term investing?
They can generate exceptional returns in the right cycle for their sector or theme, but they're generally not recommended as a core, long-term holding on their own, because they carry significantly higher concentration risk than diversified equity funds. Most financial planners suggest limiting them to a small satellite portion of an overall portfolio.
How much of my portfolio should be in sector or thematic funds?
There's no universal number, but many financial planners suggest keeping sector and thematic exposure to a small percentage of an overall portfolio — treating it as a satellite, higher-conviction bet on top of a diversified core, rather than a primary holding.
How do I know when to exit a sector or thematic fund?
Exiting at the right time is significantly harder than entering, since sector cycles can turn quickly and without much warning. Watching for signs the original investment thesis has largely played out (e.g. valuations in that sector becoming stretched relative to history) is more reliable than trying to time an exact peak.
Is a thematic fund less risky than a sector fund because it spans more sectors?
Somewhat, but not by a large margin. A thematic fund does spread its 80%+ allocation across multiple related sectors instead of just one, which can soften sector-specific shocks slightly — but it's still concentrated around a single investment thesis and carries meaningfully more concentration risk than a genuinely diversified equity fund.
See this concept applied to your own portfolio
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