Sectoral and Thematic Mutual Funds: When (and When Not) to Use Them

Between April 2023 and March 2024, PSU (public sector undertaking) funds were the single best-performing mutual fund category in India — the Nifty PSE Index returned approximately 90% in FY2024. AMFI data shows PSU fund SIP and lump-sum inflows peaked in February–March 2024, near the top of the cycle. By early 2025, the same index had corrected approximately 25% from its peak. Most investors who entered PSU funds at their peak had not recovered their entry price more than a year later.

Quick answer: Sectoral and thematic funds add concentration risk, not diversification. They are appropriate as satellite positions (5–10% of equity) only when the investor has genuine sector expertise, a clear entry rationale based on current cycle and valuations — not past performance — and a written exit plan. For most investors, most of the time, a flexi-cap or diversified multi-cap fund captures sector exposure automatically without the timing and concentration risk.

What Sectoral and Thematic Funds Actually Do

SEBI defines sectoral funds as those investing at least 80% of assets in stocks from a single sector — banking, technology, pharma, FMCG, infrastructure, energy. Thematic funds are broader: at least 80% in a theme that may cut across sectors, such as ESG, consumption, manufacturing, or digital India.

The key structural fact: you are removing the fund manager's ability to diversify out of the sector. A banking fund manager must own banks regardless of whether valuations are stretched, NPAs are rising, or the rate cycle is turning. There is no escape valve.

This is categorically different from a flexi-cap manager who has the option to be 10% in banks or 30% in banks depending on their assessment. Sectoral fund investors bear the full cycle risk of the sector — up and down.

If you'd rather have a fee-only advisor review whether any sectoral allocation makes sense in your portfolio, book a free portfolio audit.

The Momentum Trap: Why Most Investors Buy at the Wrong Time

Sectoral fund flows in India follow a predictable pattern:

1. A sector performs exceptionally well for 2–3 years (driven by a cyclical upswing)
2. Media coverage, market commentary, and fund recommendations increase
3. New fund launches spike — AMCs launch sector NFOs near peak inflows
4. Retail investors pile in
5. The cycle turns; sector corrects 30–50%
6. Investors hold, hoping for recovery — or sell at a loss

This pattern repeated across IT (2021 peak), PSU (2024 peak), and Pharma (2020 peak). It is not investor irrationality — it is a structural result of return-chasing, which is the natural human response to performance data.

The problem is that a sector fund's 3-year return number at peak is highest precisely when the next 3-year return is most likely to disappoint.

Recent Cycle Examples

PSU Funds: The 2023–24 Cycle

The Nifty PSE Index rose approximately 90% in FY2024. Funds tracking or benchmarked to PSU/defence/infra themes were the top performers in virtually every 1-year return ranking. Fund houses launched multiple NFOs in this space. Inflows peaked in Q4 FY2024.

From the March 2024 peak to early 2025, the same index corrected approximately 25%. Investors who entered in the last quarter of FY2024 had negative returns for 12+ months. The FY2024 boom was driven by a specific policy cycle — government capex, defence budgets, and disinvestment expectations — that did not continue at the same pace.

Pharma Funds: The 2020 Cycle

Pharma was a COVID beneficiary. Fund NAVs rose 50–60% in calendar year 2020. Inflows into pharma funds surged. Investors who entered at the 2020–2021 peak, after seeing the headline returns, have broadly lagged the broader market over the 3 years since. The business cycle — COVID tailwinds ending, US FDA scrutiny, export pricing pressure — turned exactly when investors' appetite for pharma funds peaked.

IT Funds: The 2021 Cycle

Information technology funds saw enormous interest in 2020–2021, driven by COVID-era digital acceleration and US tech valuations. The Nifty IT Index fell 35–40% from its early 2022 peak through calendar 2022. Investors who entered at the 2021 peak experienced a prolonged recovery period.

When Sectoral Funds Can Make Sense

The honest answer is that for most retail investors, sectoral funds will not improve outcomes and are more likely to reduce them. But there are legitimate use cases:

1. Genuine sector expertise

A pharmaceutical professional who follows drug approvals, pipeline data, and pricing dynamics for 10 years has an informational edge in pharma stocks that most investors lack. Similarly, a banking analyst understands NPA cycles, credit costs, and interest rate transmission at a level that justifies a view. Without domain expertise, sector fund investing is cycle timing without the tools to time cycles.

2. Deliberate satellite allocation with an exit thesis

If you have a reasoned view — "infrastructure order books are at a 15-year high, Nifty Infra P/E is at a 10-year average, and the government spending pipeline supports 3–4 more years of capex" — and you have explicitly decided the sector fund is 8% of your equity portfolio with a plan to exit at a specific valuation trigger, that is a deliberate, thesis-based position. This is different from buying because it was in the top 5 funds last year.

3. Already-diversified core

If your portfolio is already 80–85% in a diversified Nifty 50 + flexi-cap combination and you want to express a specific sector view with 5–8% of equity, the diversified core limits your downside. The danger is investors who hold 30–40% in sector funds because of high recent returns — at that point, the sector fund IS the portfolio.

How to Evaluate Before Investing

If you are still considering a sectoral or thematic fund, answer these questions before investing:

Sector cyclicality: How many times in the past 15 years has this sector declined 30%+ from its peak? (The answer for banking, IT, pharma, infra, and PSU is: multiple times. This is not exceptional risk — it is normal cyclical behaviour.)

Entry valuation: What is the sector's P/E ratio vs its own 10-year median? Entering when the sector trades at a significant premium to its own historical average is buying near the cycle top, statistically.

The exit plan: Write it down before buying. "I will exit when (a) the sector P/E returns to its 10-year average, or (b) the policy/earnings driver that justified the thesis reverses." If you cannot write this, you do not have an exit plan.

Satellite sizing: Is this less than 10% of your equity portfolio? If it is more, you are not making a satellite bet — you are making the sector the dominant driver of portfolio performance.

Thematic Funds: More Diversified but Same Timing Risk

Thematic funds (consumption, manufacturing, ESG, digital India) are slightly more diversified than pure sectoral funds — they can hold companies across sectors as long as they fit the theme. This reduces concentration but does not eliminate cyclical risk. A "consumption India" theme will rise and fall with consumer spending cycles. A "manufacturing" theme rises with the capex cycle and contracts with it.

The same entry-valuation and exit-plan questions apply to thematic funds. The same momentum trap applies.

FAQ

My advisor says sectoral funds add diversification to my portfolio. Is that correct?

No. Sectoral funds add concentration, not diversification. Diversification means owning assets whose returns are not correlated — adding a banking fund to a portfolio that already has a Nifty 50 index fund (which is 30% financial services) increases your banking exposure. It does not reduce risk; it amplifies sector-specific risk. The correct diversification tools are assets with genuinely low correlation to Indian large-cap equity: international funds, short-duration debt, or different equity styles (value vs growth).

Pharma / defence / consumption has done very well. Is it too late to invest?

When a sector fund appears in the top 5 funds by 1-year or 3-year return, it is often near the end of its outperformance cycle, not the beginning. Recency bias — the tendency to extrapolate recent returns into the future — is the primary driver of sectoral fund losses. If the sector's P/E is significantly above its 10-year median and recent returns are very high, the base case for the next 3 years is mean reversion, not continuation.

What about sector index funds (e.g., Nifty Bank BeES)?

Sector index funds (ETFs or index funds) have one advantage over active sectoral funds: they are cheaper (lower TER) and more transparent. But they have all the same concentration and timing risks. A Nifty Bank Index fund is mechanically superior to an active banking fund on cost. The concentration risk is identical.

Is it worth holding a sectoral fund if I believe in the 10-year India story?

The "India growth story" is better captured by a diversified fund — Nifty 50, Nifty 500, or a flexi-cap — than by any single sector. India's growth will rotate across sectors over a decade: the sectors that lead the next 10 years are not necessarily the same as those that led the last 10. A diversified fund rotates automatically as market capitalisation shifts. A sector fund is frozen.

Sectoral and thematic funds are not inherently bad instruments — they are appropriate tools used by the wrong people at the wrong time in the wrong proportions. The 5–10% satellite rule, the entry valuation check, and the written exit plan are what separates a deliberate thesis-driven bet from performance-chasing with extra steps.

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