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Warren Buffett's 90% Stock Portfolio in $241B VTSAX
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Warren Buffett's 90% Stock Portfolio in $241B VTSAX

Warren Buffett recommends index funds, with 90% of his stock portfolio in VTSAX, a $241 billion fund. This strategy has gained 10.4% annually over 10 years. Learn why index funds are a top choice for US investors.

3 min readJune 4, 2026

Over 90% of Warren Buffett's stock portfolio is invested in index funds, with the majority in the Vanguard Total Stock Market Index Fund (VTSAX), a $241 billion fund. This investment strategy has earned an average annual return of 10.4% over the past decade. With the US stock market reaching new highs, many investors are looking for a low-cost and efficient way to invest in the market, and index funds are becoming increasingly popular.

What's Happening Right Now

The S&P 500 index has gained 14.1% over the past year, with the VTSAX fund closely tracking this performance. The fund's 0.04% expense ratio is significantly lower than the average 1.42% expense ratio of actively managed funds. This low-cost approach has helped VTSAX attract over $241 billion in assets, making it one of the largest index funds in the US.

Why It Matters for US Investors

Index funds offer a range of benefits for US investors, including diversification, low costs, and tax efficiency. By investing in a broad market index, such as the S&P 500, investors can gain exposure to 500 of the largest US companies, reducing their risk and increasing potential long-term returns. Additionally, index funds typically have lower expense ratios than actively managed funds, which can help investors save money on fees and keep more of their investment returns.

What Analysts Are Saying

Warren Buffett has consistently recommended index funds as a top investment choice for individual investors. In his 2016 shareholder letter, Buffett wrote that 90% of his stock portfolio is invested in index funds, with the majority in VTSAX. Other experts, such as John Bogle, the founder of Vanguard, have also advocated for index fund investing, citing its low-cost and efficient approach.

Key Takeaways

  • Index funds offer a low-cost and efficient way to invest in the US stock market.
  • VTSAX is a popular index fund with a 0.04% expense ratio and $241 billion in assets.
  • Warren Buffett recommends index funds, with 90% of his stock portfolio invested in these funds.

Frequently Asked Questions

What is an index fund?

An index fund is a type of investment fund that tracks a specific market index, such as the S&P 500. It aims to replicate the performance of the underlying index by holding a representative sample of the same securities.

How do I invest in an index fund?

US investors can invest in index funds through a brokerage account or a financial advisor. Popular index funds, such as VTSAX, can be purchased directly from the fund provider or through a trading platform.

What are the benefits of index fund investing?

Index fund investing offers a range of benefits, including diversification, low costs, and tax efficiency. It also provides a low-maintenance and efficient way to invest in the US stock market, with minimal effort required from the investor.