What is Extended Market Index Fund?

4 mins read
by Angel One
Extended market index funds invest in mid- and small-cap US stocks, complementing large-cap-focused funds like the S&P 500. They offer diversification and growth potential but have higher volatility and lower liquidity.

The vast landscape of the US stock market offers a wealth of investment opportunities. However, for those seeking exposure beyond the titans of industry, the extended market index fund emerges as a compelling option. Let’s delve into this fund, understanding its composition, benefits, and how they can fit into your investment strategy.

What is an Extended Market Index Fund?

An extended market index fund, or a completion index fund, complements the widely recognised S&P 500 Index. While the S&P 500 tracks the performance of 500 large-capitalisation (large-cap) companies, this fund focuses on the remaining US stock market pie slice. 

This slice encompasses mid-cap and small-cap companies, allowing investors to participate in the potential of these often overlooked segments. The fund possesses around 3,000 equities, representing one-fourth of the market capitalisation of the US stock market and a wide range of companies.

There are two main ways an extended market index fund can achieve its composition:

  • S&P Completion Index: This is a widely used approach. The index tracks the entire S&P Total Stock Market Index, which encompasses large, mid, and small-cap companies. However, it excludes the constituents of the S&P 500 (large-cap companies). This essentially leaves a basket of mid-cap and small-cap stocks representing the remaining portion of the US market not covered by the S&P 500.
  • Dow Jones U.S. Completion Total Stock Market Index: Similar to the S&P approach, this method uses the Dow Jones U.S. Total Stock Market Index as the starting point. This index also includes large, mid, and small-cap companies. Again, the strategy here is to exclude the S&P 500 companies, resulting in an index focused on mid-cap and small-cap stocks.

Benefits of Investing in an Extended Market Index Fund

Any effective investing plan must include diversification. By incorporating an extended market index fund into your portfolio, you gain exposure to a broader range of companies beyond the large-cap giants. This diversification offers several advantages:

  • Growth Potential: Mid-cap and small-cap companies often exhibit higher historical growth rates than their large-cap counterparts. While inherently riskier, these companies have the potential for significant future expansion. 
  • Reduced Volatility: Although an extended market index fund tends to be more volatile than large-cap focused funds, they can still offer a smoother ride compared to investing in individual small-cap stocks. The diversification within the index helps mitigate some of the risks associated with individual companies.
  • Improved Market Representation: The fund provides a more complete picture of the US stock market’s overall performance by including mid-cap and small-cap companies. This can be helpful for investors seeking a well-rounded exposure to the market.

Considerations When Investing in an Extended Market Index

While extended market index funds offer attractive benefits, it’s crucial to understand the potential drawbacks before making an investment decision:

  • Higher Volatility: As mentioned earlier, the fund’s equities experience greater price fluctuations compared to large-cap-focused funds. This increased volatility can be unsettling for risk-averse investors.
  • Lower Liquidity: Mid-cap and small-cap companies tend to have lower trading volumes than large-cap stocks. This can make entering or exiting positions in the fund slightly more challenging.
  • Limited Historical Data: Smaller companies with extensive track records may have shorter historical data available than large-cap companies. This can make analysing past performance and predicting future trends more challenging.

Who Should Consider an Extended Market Index Fund?

An extended market index fund is a great fit for investors with a long-term investment horizon and a tolerance for some level of risk. These funds are particularly suitable for those seeking:

  • Broader Market Exposure: Investors looking to capture the potential of the entire US stock market, beyond just the large-cap segment, will find an extended market index fund valuable.
  • Growth Potential: This fund can benefit individuals seeking higher returns associated with mid-cap and small-cap companies.
  • Portfolio Diversification: An extended market index fund can add valuable diversification to a portfolio already containing large-cap-focused funds or individual stocks.

Conclusion

Extended market index funds are like venturing into the wild – exciting potential for growth and discovery, but with a touch more risk. If you’re a long-term investor with a taste for adventure, it can be a great way to diversify your portfolio and explore the hidden gems of the US market. Remember, research is key before you embark on this exciting investment journey!

FAQs

What are the drawbacks of an extended market index fund?

The drawbacks of an extended market index funds are higher volatility, lower liquidity, and limited historical data for smaller companies.

Who should invest in an extended market index fund?

The funds can be invested in by investors with a long-term horizon, tolerance for risk, and a desire for broader market exposure or growth potential.

Are extended market index funds a good fit for all investors?

No, extended market index funds are suitable for investors comfortable with some risk and a long-term outlook.