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S&P 500 Index: What It's for and Why It's Important in Investing

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May 8, 2023


What’s Inside

The S&P 500 index fund tracks the performance of 500 of the top large-cap public-listed companies in the United States. The index is very popular and widely regarded as one of the best indicators of the overall performance of the US stock market.

Investors and analysts use the S&P 500 index to track the US stock market's performance and compare individual stocks' performance. Investing in the S&P 500 index passively can be rewarding while saving you time and effort. In this article, we answer ‘What is an S&P 500 index fund?’ and the importance of this index while investing in the US stock market.

What is the S&P 500 index fund?

Let us take a step back and understand the function of an index fund. Index funds track major market indices and aim to replicate their performance. So, in the case of the S&P 500 index fund, the index being tracked and the performance being matched is of the large-cap S&P 500 index in the US stock exchange.

The composition of the S&P 500 index includes companies from a wide range of industries, including technology, healthcare, financial services, energy, and consumer goods. Higher weightage is accorded to companies with a higher market capitalisation that, in turn, has a greater influence on the fund's eventual performance. For example, the stocks of some of the largest companies in the index, like Apple and Microsoft, have a far higher impact on the market than other relatively smaller firms.

Benefits of investing in an S&P 500 index fund

S&P 500 index funds attract many investors due to their various benefits. Here are some of the most prominent ones:

Exposure to US stocks

The US stock market is home to some of the largest companies in the world, such as Apple, Alphabet, Microsoft, Meta, and several more. Moreover, it is also the breeding ground for several emerging enterprises in innovative sectors that you can buy cheap and cash-in later.


Instead of purchasing stocks of individual companies, an S&P 500 Index Fund provides you exposure to a diversified portfolio of large-cap US stocks across various companies and industries. This helps reduce your overall portfolio risks.

Low cost of purchase

S&P 500 Index Funds are often passively managed (just like index mutual funds). This means that they have lower management fees than other actively managed funds, which reduces your cost of ownership and adds to your eventual returns.


Mutual funds and exchange-traded funds (ETFs) are the two most popular ways of investing in the S&P 500 Index. Not only are they easy to acquire, but you can also set up a SIP, invest in them regularly with small amounts, and build a large corpus over time.

Strong historical performance

The S&P 500 Index has historically provided strong returns over the long run, thus, making it a good choice for those looking to invest with long-term goals in mind.

Wrapping it up

If you want to gain exposure to the US market, an S&P 500 index fund is a good place to start. It is a low-cost, diversified investment tool that has historically provided strong returns over the long term. Moreover, it is easier to invest in than buying several stocks of multiple companies and having to regularly monitor each of them.

If you, too, want to invest in an S&P 500 index fund and further save on commission costs, consider Fi Money.

Mutual Fund investments on Fi are commission-free. With its intuitive user interface, suited for novice & seasoned investors, you can select from over 800 direct Mutual Funds. Plus, Fi's 100% secure as it functions under the guidance of epiFi Wealth, a SEBI-registered investment advisor. To help simplify the steps involved, you can invest daily, weekly, or monthly via automatic payments or SIPs — created with one screen tap. Moreover, Fi offers 100% flexibility with zero penalties for missed payments.

Frequently Asked Questions

1. Why is the S&P 500 index useful to investors?

The S&P 500 Index is considered a benchmark for the US stock market. Therefore, millions of investors use it as a way to measure the performance of their portfolio against the broader market. The stocks that the index comprises are some of the leading companies in a variety of sectors. By investing in a single instrument, you get exposure to all those companies, thereby, both hedging your risks and increasing your chances of higher returns.

2. What is the purpose of the S&P?

S&P is a leading provider of financial information, index performance, and credit ratings. The S&P 500 index, in particular, is a widely recognised benchmark for the performance of the US stock market. Analysts and investors track this index to understand the prevalent market conditions, predict future market movements, and evaluate a company’s financial health before making an informed investment decision.


Investment and securities are subject to market risks. Please read all the related documents carefully before investing. The contents of this article are for informational purposes only, and not to be taken as a recommendation to buy or sell securities, mutual funds, or any other financial products.
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