Large-cap fund vs index fund in India
SEBI’s October 2017 categorisation circular mandated that large-cap equity mutual funds invest at least 80% of total assets in equity of large-cap companies, defined as the top 100 companies by full market capitalisation listed on NSE/BSE as per AMFI’s semi-annual ranking. Index funds tracking the Nifty 50 or Sensex invest in the same broad universe (top 50 or top 30 companies by market cap) but use a passive, rules-based replication strategy with no active stock selection.
The overlap between large-cap fund investment universes and Nifty 50 constituents is high, which frames the key analytical question: whether the active large-cap fund’s higher expense ratio is justified by consistent alpha generation over an equivalent index fund.
SEBI categorisation
SEBI’s circular (SEBI/HO/IMD/DF3/CIR/P/2017/114) categorises mutual funds as follows:
- Large-cap fund: Minimum 80% in equity and equity-related instruments of large-cap companies (top 100 by market cap per AMFI semi-annual list).
- Index fund / ETF: A fund replicating a specific index (Nifty 50, Sensex, Nifty 100, etc.) by holding the index’s constituents in proportion to their index weights. No SEBI-mandated allocation percentage; the fund holds the index portfolio.
AMFI updates the list of large-cap, mid-cap, and small-cap companies semi-annually (in January and July).
Portfolio construction
| Dimension | Large-cap active fund | Nifty 50 index fund |
|---|---|---|
| Stock universe | Top 100 companies (AMFI list) | Nifty 50 constituents |
| Stock selection | Fund manager discretion | Rules-based; mirror Nifty 50 weights |
| Number of stocks | Typically 30–60 | 50 |
| Benchmark | Nifty 100 Total Return Index (commonly) | Nifty 50 Total Return Index |
| Turnover | Active; varies with manager | Low; index reconstitution-driven |
| Flexibility | Fund manager can hold cash, reduce/overweight sectors | Must replicate index; minimal cash holding |
Expense ratio
| Fund type | Typical TER range (direct plan) |
|---|---|
| Active large-cap fund (direct plan) | 0.5%–1.0% per annum |
| Nifty 50 index fund (direct plan) | 0.05%–0.20% per annum |
The expense ratio differential (approximately 0.5%–0.9% per annum for direct plans) creates a return headwind for actively managed large-cap funds relative to index funds, even before considering alpha generation.
Historical alpha record
SPIVA India Scorecard data (published by S&P Dow Jones Indices) consistently shows that a majority of active large-cap funds underperform the Nifty 50 or Nifty 100 Total Return Index over three-year and five-year rolling periods.
SPIVA India Year-End 2023 highlights:
- Over 5 years: approximately 73%–78% of active large-cap funds underperformed the S&P BSE 100 Total Return Index.
- Over 10 years: the underperformance percentage exceeded 85%.
This data reflects the general international pattern: as market capitalisation increases and analyst coverage deepens, active managers find it increasingly difficult to generate alpha that compensates for the higher TER.
Individual active large-cap funds have outperformed their benchmarks over specific periods, and the SPIVA data covers aggregate fund populations. Past underperformance of the average does not predict any specific fund’s future performance.
Tracking error and index replication quality
Index fund performance relative to the index is measured by tracking error, the standard deviation of daily return differences between the fund and its benchmark.
| Index fund | Typical tracking error (annualised) |
|---|---|
| Nippon India Index Fund – Nifty 50 | 0.02%–0.08% |
| HDFC Index Fund – Nifty 50 Plan | 0.02%–0.10% |
| UTI Nifty 50 Index Fund | 0.02%–0.10% |
Low tracking error is a quality indicator for index funds. Dividend reinvestment timing, corporate action treatment, rebalancing lags, and TER drag are the main sources of tracking error in Indian index funds.
Risk and return profile
Both instrument types invest predominantly in large-cap Indian equities and carry comparable market risk. In bull markets, active large-cap funds have scope to outperform by concentrating in high-conviction positions. In bear markets, the fund manager may defensively hold cash or reduce high-beta positions, potentially limiting drawdowns.
Index funds are fully invested at all times (near-zero cash drag) and will reflect the full market decline on the downside. However, the low TER means they retain more of the recovery when markets recover.
Use within a portfolio
SEBI’s large-cap universe (top 100) is broader than the Nifty 50 (top 50). An active large-cap fund may hold stocks ranked 51–100 by market cap, which could provide differentiated exposure relative to a pure Nifty 50 index fund. A Nifty 100 index fund would provide passive exposure to the full large-cap universe.
Summary comparison table
| Dimension | Active large-cap fund | Nifty 50 index fund |
|---|---|---|
| Investment universe | Top 100 companies | Nifty 50 (top 50) |
| Stock selection | Active (fund manager) | Rules-based replication |
| TER (direct plan) | 0.5%–1.0% | 0.05%–0.20% |
| Historical alpha | Majority underperform benchmark over 5-10 years (SPIVA data) | Tracks index minus TER |
| Tracking error | Not applicable | Very low |
| Benchmark | Nifty 100 TRI typically | Nifty 50 TRI |
| Cash holding | Discretionary | Near-zero |
| Suited to | Investors who select proven active managers with long track record | Cost-conscious, passive-oriented investors |
See also
- Active equity vs passive equity in India
- Index fund vs ETF in India
- Mutual fund vs ETF in India
- Large-cap mutual fund India
- Nifty 50
- Mutual fund
- How to invest in index funds on Coin
References
- SEBI circular SEBI/HO/IMD/DF3/CIR/P/2017/114, Mutual fund categorisation.
- AMFI, Semi-annual large-cap, mid-cap, small-cap company list.
- SPIVA India Scorecard Year-End 2023, S&P Dow Jones Indices.
- NSE, Nifty 50 index methodology, nseindia.com.
- AMFI, Index fund TER disclosures.