In the world of mutual funds, a quiet revolution has been taking place. Over the last three years, the popularity of index funds among retail investors has surged dramatically, marking a shift in investment patterns. A recent study by Zerodha Fund House sheds light on this transformative trend, revealing that the total retail folios in index funds have increased nearly twelvefold since 2020.
The study highlights that the number of retail folios in index funds skyrocketed from 4.95 lakh in March 2020 to an impressive 59.37 lakh by December 2023. This growth is not just in numbers but in investor sentiment, showing a clear shift towards passive investment strategies. The appeal of index funds lies in their simplicity, lower costs, and the ability to match market returns, making them an attractive option for a broad spectrum of investors.
The number of index mutual funds available to investors has also seen an increase. In March 2020, there were just 44 index funds; by March 2024, this number had grown to approximately 207, marking an absolute growth of 370%. This proliferation reflects the increasing demand and confidence in index-based investment products.

One of the most striking findings of the Zerodha report is the phenomenal growth in the total Assets Under Management (AUM) of index funds. From March 2020 to March 2024, the AUM of both equity and debt index funds ballooned nearly 25 times, reaching approximately Rs 2,13,500 crore. This rapid accumulation of assets reflects the growing trust and reliance on index funds among retail investors.
Interestingly, debt index funds have emerged as a component of this growth. Until March 2021, debt index funds had negligible to no AUM. However, by March 2024, they had crossed the Rs 1.1 lakh crore milestone, constituting about 51.5% of the total AUM. This growth indicates a diversification in investor preference, with many seeking stable, lower-risk investments alongside equity index funds.
As of March 31, 2024, the index fund landscape included 120 equity index funds and 87 debt index funds. The Nifty 50 index dominates the AUM within these funds, commanding 70.7% of the total AUM, which equates to Rs 52,000 crore. This preference for largecap stocks signals a conservative yet confident approach among investors, aligning with the broader market trends.
The Nifty Next 50 index, with 14.6% of the total AUM (Rs 10,000 crore), along with allocations to mid and smallcap stocks, suggests that investors are also willing to embrace a balanced approach to risk and return. This investment strategy highlights a sophisticated understanding of market dynamics among retail investors.
The index funds category reached a record high in assets, totalling Rs 2.43 lakh crore as of June 2024. This represents a nearly 900% surge in assets over the past three years, making index funds the fastest-growing category among all mutual fund types. The report emphasizes that no other mutual fund category has matched the AUM growth rate of index funds during this period.
The dramatic rise in the popularity of index funds among retail investors reflects a broader shift towards passive investing. With the simplicity and cost-efficiency of index funds, combined with the potential for stable returns, these investment vehicles are likely to continue their upward trajectory. As more investors seek out ways to align their portfolios with market performance while minimizing fees and complexity, the role of index funds in the mutual fund industry is set to expand even further.
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