What Are Equal Weight Index Funds?

Index funds are the most popular tool for passive investing. And within them, most people are familiar with the classic approach of market-cap weighted funds, where the largest companies take up the biggest portion of your investment. However, a lesser known form of index funds are – equal weight index funds. They allocate the same weight to every stock in the index, no matter how big or small the company is.

This strategy is gaining attention among Indian investors, especially after periods where mid- and small-cap companies outperformed large-caps. For example, over certain 5-year stretches, the Nifty 50 Equal Weight Index has beaten the standard Nifty 50. In a market where volatility and sector dominance can affect returns, Equal weight investing can offer a refreshing alternative.

What Is An Equal Weight Index Fund?

Before getting into their intricacies, let’s answer this question first. 

An Equal weight index fund is a type of passive mutual fund or ETF that tracks an Equal weighted index. Unlike traditional market-cap weighted indices, where the weight of each stock depends on its market value, an Equal weight index gives each stock the same allocation.

For example, in a Nifty 50 Equal Weight Index, each of the 50 companies gets 2% of the portfolio. Whether it’s a giant like Reliance Industries or a relatively smaller company like Divi’s Laboratories, both have the same importance in the index.

Suppose you invest ₹ 1,00,000 in a Nifty 50 Equal Weight Fund. Each stock gets 2% = ₹ 2,000 invested. If Reliance rises 10% and Divi’s also rises 10%, both contribute equally to your returns, unlike a market-cap weighted fund where Reliance’s bigger size would dominate the outcome.

How Equal Weight Differs From Market-Cap Weighted

To understand the appeal of Equal weight investing, it’s important to compare it to the traditional market-cap weighted approach.

In a market-cap weighted index, bigger companies naturally get higher weights because their market capitalisation is larger. For example, in the Nifty 50, companies like Reliance Industries and HDFC Bank can have weights of 9–10% each, while smaller constituents may have less than 1%.

Since it has been mentioned a few times already, let us clarify what market capitalisation means. Also called market cap or m-cap, is the total value of a company’s outstanding shares in the stock market. It is calculated by multiplying the company’s share price by its total number of shares.

For example, if a company has 10 crore shares trading at ₹ 200 each, its market cap is ₹ 2,000 crore.

Market cap helps classify companies into large-cap, mid-cap, and small-cap categories, which is important when comparing market-cap weighted funds and Equal weight funds.

In an equal weight index, each stock gets exactly the same proportion, so no single stock dominates your portfolio. Here are the key differences between the two types of index funds:

Advantages Of Equal Weight Index Funds

Equal weight funds bring several benefits for investors looking for diversification and potentially better long-term performance.

• Diversification & Lower Concentration Risk

In market-cap weighted funds, a few large companies often decide the fate of your returns. Equal weight funds reduce this concentration by ensuring each stock has the same impact.

• Exposure To Mid-and Small-Caps

Because weights are equal, smaller companies get a bigger share compared to market-cap weighted indices. This can enhance returns in market cycles where mid- and small-caps outperform.

• Built-In Rebalancing

Equal weight indices are periodically rebalanced. If a stock price falls, its weight drops, so the fund buys more of it. If a stock price rises, its weight increases, so the fund trims it. This systematic process naturally locks in gains and adds to underperformers.

• Smart-Beta / Value Tilt

Equal weight investing is considered a smart beta strategy in the sense that it’s rule-based like passive funds but with a tilt that historically captures a “value” or “size” premium.

• Potential For Outperformance

Data from India and global markets show that in certain periods, Equal weight indices outperform their market-cap weighted peers, especially when smaller companies lead the rally.

Drawbacks & Considerations

While appealing, Equal weight funds are not perfect and have some trade-offs.

• Higher Turnover and Higher Costs 

Rebalancing to restore equal weights means more frequent buying and selling, which can increase transaction costs and turnover.

• Greater Volatility & Liquidity Risk

With more exposure to smaller companies, the portfolio can experience bigger ups and downs. Also, some smaller stocks may have lower trading volumes.

• Rebalancing Issues

Events like mergers, de-listings, or sudden stock rallies can cause significant short-term changes in weights, which the rebalancing process must handle.

• Possibly Higher Expense Ratio

Equal weight funds often have slightly higher expense ratios compared to standard index funds due to higher maintenance.

Who Should Consider Equal Weight Funds

Equal weight index funds are best suited for investors who:

• Seek more balanced diversification beyond large-cap dominance.
• Feel mid- and small-caps will contribute to market growth.
• Are willing to accept higher short-term volatility for potential higher long-term returns.

They may not be ideal for highly conservative investors who prefer the stability of large-cap heavy indices.

Popular Equal Weight Funds In India

Although m-cap weight index funds are more abundant in India, equal weight funds have been gaining attention for their diversification benefits and potential for value-tilted returns. Some noteworthy options include:

1. ICICI Prudential Nifty 50 Equal Weight Index Fund 

   • Tracks the Nifty 50 Equal Weight Index with equal allocation to all 50 companies.
   • Known to have performed better than most of its peers in the last 2 years.

2. Mirae Asset Nifty 50 Equal Weight ETF

   • Passively replicates the Nifty 50 Equal Weight Total Return Index.
   • Suitable for investors seeking to avoid concentration in the top few large-cap stocks.

3. Nippon India Nifty 100 Equal Weight ETF

   • An ETF providing exposure to the Nifty 100 Equal Weight Index, covering a broader set of companies.
   • Can be traded like a stock during market hours via a demat account.

4. Nippon India Nifty Next 50 Junior BeES FoF

   • Fund of Funds that invests in units and mimics the performance of Reliance ETF Junior BeES.
   • Almost ₹ 600 crore AUM (as on 31st July, 2025).

5. SBI Nifty 50 Equal Weight ETF

   • ETF format with lower expense ratio compared to fund-of-fund equivalents.
   • Requires investors to be comfortable with demat-based transactions.

Conclusion

Equal weight index funds offer a fresh take on passive investing, balancing exposure across all constituents of an index. They can reduce concentration risk, enhance mid- and small-cap exposure, and follow a disciplined rebalancing process. However, they also come with slightly higher costs and volatility.

If you are considering investing:

1. Assess your risk tolerance.
2. Compare expense ratios and tracking error.
3. Decide if the added mid/small-cap exposure aligns with your goals.

Additional Read: What are Index Funds? Meaning, Types, Working