Should You Invest in a Total Stock Index Fund or S&P 500 Index Fund? (2024)

Compare Holdings and Performance

ByKent Thune

Updated on October 17, 2022

Reviewed byGordon Scott

Fact checked byAriana Chávez

In This Article

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In This Article

  • How They Invest
  • Performance
  • Bottom Line
  • Frequently Asked Questions (FAQs)

Should You Invest in a Total Stock Index Fund or S&P 500 Index Fund? (1)

Comparing the Total Stock Market Index to the S&P 500 Index is a smart way to choose a high-quality, low-cost core holding for your portfolio. Although each index shares many of the same holdings with the other, you should know some key factors before you invest. Find out which index fund is best for your portfolio.

Total Stock Market Index vs. S&P 500 Index

The difference between a total stock market index fund and an S&P 500 index fund is that the includes only large-cap stocks. The total stock index includes small-, mid-, and large-cap stocks. However, both indexes represent only U.S. stocks.

Total Stock Market Index Fund Holdings

Funds that claim to be "total stock market" index funds typically track an index that includes between 3,000 and 5,000 small-, mid-, and large-cap U.S. stocks. Examples of total stock indexes include the Wilshire 5000 Index and the Russell 3000 index. The Vanguard Total Stock Market Index Fund (VTSAX) tracks the CRSP U.S. Total Stock Market Index, which includes approximately 4,136 stocks.

S&P 500 Index Fund Holdings

Unlike total stock market index funds, S&P 500 index funds only track specific stocks on the Standard & Poors 500 index. The S&P 500 consists of about 500 stocks of the largest U.S. publicly traded companies, as measured by market capitalization.

Tip

Total stock market indices and the S&P 500 index are cap-weighted, which means the companies with the largest market capitalization will receive the highest allocation of stocks. For example, these indexes will allocate more to large U.S. companies like Amazon (AMZN), Apple (AAPL), Microsoft (MSFT), and Meta (FB), formerly Facebook.

Total Stock Market Index vs. S&P 500 Index: Performance

Investors may be surprised to know that returns for total stock market index funds and S&P 500 index funds are similar. The conventional thinking is that small-cap stocks outperform large-cap stocks in the long term (periods of 10 years or more). This assumption suggests that a total stock market index fund would outperform an S&P 500 index fund over time.

Compare the performance of some historical returns of a total stock market and S&P 500 indexes:

Total Stock Market Index vs. S&P 500: Performance Comparison
Vanguard Index Fund (Ticker)1-Yr3-Yr5-Yr10-Yr
Total Stock Market Index (VTSAX)11.93%17.46%14.64%14.22%
S&P 500 Index (VFIAX)16.35%18.21%15.14%14.55%

The key takeaway in the table is that the historical performance of each fund is similar, especially as time passes. The 10-year returns are only separated by 0.33%. Also, the assumption that small-cap stocks would help boost returns in a total stock market index fund was not correct in the past 10 years (the S&P 500 has a higher annualized return).

Tip

When investing in a total stock market index fund, try not to make the mistake of thinking that you have a fully diversified mix of large-cap stocks, mid-cap stocks, and small-cap stocks in one fund.

Since these funds are cap-weighted, many holdings are large-cap stocks, making the performance similar to an S&P 500 index fund.

A total stock market fund does not capture the total stock market; it captures a majority of the large-cap stock market with a small representation of other segments, such as mid-cap and small-cap stocks. Therefore, its average market cap is large-cap, explaining why it performs similarly to an S&P 500 index fund.

Bottom Line

Total stock market index funds are only slightly more diversified than S&P 500 index funds. Since both types of indexes are heavily weighted toward large-cap stocks, the performance of the two funds is highly correlated (similar). However, investors can achieve greater diversification, and potentially greater performance, by selecting their own allocations.

For example, investors wanting to capture a complete representation of the U.S. stock market may choose to allocate approximately one-third of their portfolio assets to three separate indexes—the S&P 500 for large-caps, the S&P mid-cap 400 for mid-caps, and the Russell 2000 for small-caps. Most importantly, investors should first determine that stocks are appropriate for their risk tolerance and financial goals.

Frequently Asked Questions (FAQs)

What percentage of the total U.S. stock market is covered by the S&P 500?

The total market capitalization of the Wilshire 5000 Total Market Index is roughly $51.7 trillion. The S&P 500's market cap is roughly $38.9 trillion. Therefore, the S&P 500 represents more than 75% of the total U.S. stock market in terms of market capitalization.

How do you invest in the S&P or total stock market index?

ETFs and mutual funds are the easiest way for individual investors to invest in any type of index. For the S&P 500, the most popular ETF trades under the ticker "SPY." For the total market index, one popular mutual fund is the Vanguard Total Stock Market Index Fund (VTSAX). Vanguard also offers a total market ETF that trades under the ticker "VTI." Many different products offer substantially similar exposure for both S&P and total market strategies, so shop around to compare factors like expense ratios, liquidity, and taxation.

What is the sector weighting of total market funds like the Vanguard Total Stock Market Fund?

In order of weight, the sector weighting of the Vanguard Total Stock Market Index is information technology (28.4%), consumer discretionary (15.3%), industrials (13%), health care (12.4%), financials (11.5%), consumer staples (5%), real estate (3.6%), telecommunications (2.6%), utilities (2.8%), energy (3.4%), and basic materials (2%). These percentages are subject to change, so check the fund page for the latest weightings.

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Should You Invest in a Total Stock Index Fund or S&P 500 Index Fund? (2024)

FAQs

Should I buy Total market or S&P 500? ›

If you want some added exposure to mid- and small-cap stocks, but not as much as the Vanguard Total Stock Market ETF provides, you could simply buy both. Splitting your money between the two evenly will put most of your investments in large-cap stocks, but around 7% in mid- and small-cap stocks outside the S&P 500.

Is it better to invest in stocks or S&P 500? ›

Once you've opened an investment account, you'll need to decide: Do you want to invest in individual stocks included in the S&P 500 or a fund that is representative of most of the index? Investing in an S&P 500 fund can instantly diversify your portfolio and is generally considered less risky.

Is Vanguard Total Stock Market Index Fund a good investment? ›

Overall Rating. Morningstar has awarded this fund 3 stars based on its risk-adjusted performance compared to the 1293 funds within its Morningstar Category.

Does it matter which index fund you invest in? ›

Indexing has several benefits including lower costs, broad-based diversification, and lower taxes. Investors, however, must consider the index fund that they select since not every one is low-cost, not some may be better at tracking an index than others.

Why VTI over VOO? ›

They are Vanguard's largest ETFs by net assets. VTI is a total U.S. market fund and holds more than 3,500 stocks. VTI is better diversified and benefits from small and mid-cap stocks that grow into large caps. VOO is less diversified, tracking the performance of the S&P 500 Index.

What is the difference between S&P 500 and total stock market? ›

Pretty much by definition, the S&P 500 is mad up of large-cap companies. A total market index is mostly large-cap stocks, but by definition includes all the mid-cap and small-cap stocks as well.

Why is the S&P 500 not a good investment? ›

The S&P 500 weighting system gives a small number of companies major influence, which could have an undue negative effect on the index if one or a few of them run into trouble. The index does not expose investors to small or emerging companies with the potential for market-beating growth.

Why shouldn't you just invest in the S&P 500? ›

The one time it's okay to choose a single investment

That's because your investment gives you access to the broad stock market. Meanwhile, if you only invest in S&P 500 ETFs, you won't beat the broad market. Rather, you can expect your portfolio's performance to be in line with that of the broad market.

What is the best index fund for beginners? ›

VFIAX and QQQM are often described as some of the best index funds for beginner investors.

What is the 10 year return on VTSAX stock? ›

Total returns
as of 04/30/20241 MONTH10 YEAR
VTSAX-4.42%203.93%
BenchmarkSpliced Total Stock Market Index2-4.41%204.27%

Which index fund gives the highest return? ›

ICICI Prudential Nifty 50 Index Fund-Growth is among India's top 10 index funds. It falls within the Large Cap Index category. Over the past year, ICICI Prudential Nifty 50 Index Fund-Growth has returned 15.09 percent. Since its inception, it has delivered an average annual return of 14.74 percent.

Should I use Vanguard or Fidelity? ›

While Fidelity wins out overall, Vanguard is the best option for retirement savers. Its platform offers tools and education focused specifically on retirement planning.

What are 2 cons to investing in index funds? ›

The benefits of index investing include low cost, requires little financial knowledge, convenience, and provides diversification. Disadvantages include the lack of downside protection, no choice in index composition, and it cannot beat the market (by definition).

Do billionaires invest in index funds? ›

In fact, a number of billionaire investors count S&P 500 index funds among their top holdings. Among those are Buffett's Berkshire Hathaway, Dalio's Bridgewater, and Griffin's Citadel.

How many different index funds should I own? ›

Experts agree that for most personal investors, a portfolio comprising 5 to 10 ETFs is perfect in terms of diversification.

Is there anything better than the S&P 500? ›

The S&P 500's track record is impressive, but the Vanguard Growth ETF has outperformed it. The Vanguard Growth ETF leans heavily toward tech businesses that exhibit faster revenue and earnings gains. No matter what investments you choose, it's always smart to keep a long-term mindset.

Which is more important Dow Jones or S&P 500? ›

Because the S&P 500 contains hundreds of large companies and represents the lion's share of total stock market value, it is considered a much better gauge of how the market is performing, even though it excludes thousands of smaller and midsize companies.

Should I buy both Nasdaq and S&P 500? ›

So, if you are looking to own a more diversified basket of stocks, the S&P 500 will be the right fit for you. However, those who are comfortable with the slightly higher risk for the extra returns that investing in Nasdaq 100 based fund might generate will be better off with Nasdaq 100.

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