The Nifty IT index returned 72% in 2021. Technology sector mutual funds were the top performers. Retail inflows into IT funds peaked at Rs. 2,400 crore in Q4 2021. The Nifty IT index then fell 26% in 2022 as rising US interest rates crushed tech valuations.

The same pattern has played out in pharma (peak inflows in 2020 after COVID-driven rally, underperformance in 2021-2022), banking (peak inflows in 2022, underperformance in 2023-2024), and infrastructure (massive inflows in 2024 after a 3-year run, unclear what follows).

The sector fund story in India is not about returns. It is about investor behavior and the systematic destruction of realized returns.

The Flow-Timing Problem: AMFI Data

SEBI and AMFI publish monthly sector fund flow data. The correlation between trailing 1-year fund performance and subsequent month inflows is approximately 0.72 - high. Investors reliably pile in after strong performance.

The correlation between trailing 1-year performance and next 1-year performance: approximately -0.18. Mean reversion is the norm.

Sector Year of Peak Inflows Fund Return in Peak Year Return in Subsequent Year
IT/Technology 2021 (Rs. 6,200 crore) +72% -26%
Pharma/Healthcare 2020 (Rs. 3,800 crore) +68% +6%
Banking/Financial 2021 (Rs. 8,100 crore) +38% +3%
Infrastructure 2023-24 (Rs. 12,000 crore) +55% TBD

In every case, retail investors entered at or near the performance peak. The subsequent year delivered significantly lower or negative returns.

The Dollar-Weighted Return Trap

Fund returns are NAV-weighted. Investor returns are dollar-weighted (accounting for when money actually entered).

Example: IT sector fund with Rs. 100 crore AUM in January 2021.

  • January-December 2021: Fund returns 72% (AUM grows to Rs. 172 crore)
  • During 2021: Rs. 4,000 crore in additional inflows (investors chasing returns)
  • January-December 2022: Fund falls 26%

The Rs. 172 crore original investors earned 72%. The Rs. 4,000 crore that entered near the peak earned -26%. The average investor in the fund actually lost money even while the fund “returned 72%” in 2021.

This is the dollar-weighted return problem. A fund can show excellent NAV performance while destroying investor wealth because investors enter at the wrong time.

Why Sector Timing Is Nearly Impossible

Sector rotation - the idea that you can identify which sector will outperform next and rotate into it - requires correctly predicting both:

  1. Which sector will outperform
  2. When to exit before it reverts

Empirical data from professional investors globally shows that sector rotation strategies underperform simple diversified equity holding in 70%+ of cases over 10-year periods. Professional fund managers with sector research teams fail at this more often than not. Individual retail investors have no realistic edge.

The sectors that look most attractive at any given moment are typically already pricing in the optimism. When RBI begins an interest rate cut cycle (good for banks), everyone knows it - bank stocks run up before the cuts actually deliver earnings improvement.

The Concentration Risk No One Talks About

A sector fund concentrating in one sector of the economy is not just return risk - it is business cycle risk. If your sector underperforms, your investment underperforms. If you work in that sector too, you face correlated risk: the same event (IT slowdown, pharma pricing pressure, real estate correction) that hurts your fund also potentially hurts your job, your employer’s stock (if held as ESOPs), and your career income.

For an IT professional, holding a technology sector fund means your income, job security, and investments are all exposed to the same cycle. This is the opposite of diversification.

When Sector Funds Make Sense

Sector funds are legitimate tools in specific circumstances:

Structural long-term themes: If you have high conviction in a multi-decade structural theme - India’s healthcare spending as a percentage of GDP, infrastructure buildout, defense indigenization - a small allocation (5-10% of equity) to the relevant sector fund as a long-term satellite position is defensible. The key: you must be able to hold through 2-3 year underperformance cycles without selling.

Hedging professional income: Counterintuitively, a small sector fund position in a sector you do not work in provides diversification. An IT professional adding a pharma or FMCG sector fund is reducing correlated risk.

The Better Alternative

For thematic exposure without sector concentration risk:

  • India’s infrastructure theme: Nifty Midcap 150 index fund already has significant infrastructure and capital goods exposure through companies like L&T, Siemens, ABB
  • India’s consumption theme: Nifty 50 includes HDFC Bank, Kotak, Reliance, Asian Paints - major consumption beneficiaries
  • Healthcare theme: Nifty 500 or Nifty Midcap 150 has pharma representation

Broad index funds give you theme exposure without single-sector concentration. When pharma runs, your Nifty 500 benefits. When it corrects, the other 450 stocks buffer the fall.

The Expense Ratio Premium

Sector funds typically charge higher expense ratios than broad market funds:

Fund Type Typical Direct Plan Expense Ratio
Nifty 50 Index 0.10-0.20%
Active large-cap 1.0-1.5%
Sector/thematic fund 1.5-2.2%

Sector funds charge you more for the privilege of making a concentrated bet. The higher fee compounds against you whether the sector performs or not.

Bottom Line

Sector funds consistently attract peak inflows when their best returns are already behind them. AMFI data shows the pattern repeating across IT, pharma, banking, and infrastructure with remarkable regularity. The dollar-weighted return that sector fund investors actually earn is substantially below the NAV-based return shown in fact sheets. For most investors, broad market index funds with natural sector diversification outperform both the funds and the investors who try to time sector rotations. If you hold sector funds, hold them for 10+ year structural themes and never buy them after a year of 40%+ returns.