Venture capitalist Chamath Palihapitiya has questioned the long-standing advice of Warren Buffett to invest in low-fee S&P 500 index funds. Palihapitiya warns of potential risks due to the index's heavy concentration in a few tech stocks.

What Happened: Buffett has consistently recommended that the average person invest in a low-fee S&P 500 index fund and hold it for the long term.

However, Palihapitiya, co-host of the "All-In" podcast, contends that a handful of tech stocks have become so valuable that owning the S&P 500 is essentially a concentrated bet on these risky businesses.

Palihapitiya's concern is that the top 10 most valuable S&P 500 companies, including Apple Inc. (NASDAQ:AAPL), Nvidia Corporation (NASDAQ:NVDA), and Microsoft Corporation (NASDAQ:MSFT), account for nearly 40% of the benchmark index's total market cap. This, he argues, contradicts the diversification principle that underpins index investing.

"When you buy an index of 500 companies, you're really buying 10 companies with 490 others thrown in," Palihapitiya said in the X post on Saturday.

Also Read: Warren Buffett's Timeless Advice For Investing $10,000: 'If You're Gonna Do Dumb Things Because Your Stock Goes Down, You Shouldn't Own A Stock At All'

"Average Americans buy S&P 500 index ETFs, in part, because Buffett told them to. They were told they would pay very little and get diversification in the 500 best companies on earth to ride out storms," he said in the post.

"That's ok if you're a "professional" and that's what you are betting on but most ETF buyers aren't professional stock traders and they will be in for a rude awakening if this isn't addressed," Palihapitiya wrote.

He warns that if these tech giants take a hit, investors could face significant losses, as their portfolios won't be sufficiently cushioned by other holdings.

Why It Matters: Palihapitiya's critique of Buffett's investment strategy comes amidst his own controversial promotion of high-risk special purpose acquisition deals, or SPACs, during the pandemic.

Buffett, on the other hand, has largely avoided tech stocks throughout his career, focusing on value investing within his circle of competence.

This divergence in investment approaches underscores the ongoing debate about the role of tech stocks in portfolio diversification and the potential risks associated with over-reliance on a few high-performing companies.

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This content was partially produced with the help of AI tools and was reviewed and published by Benzinga editors.