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• Warren Buffett's surprise announcement Saturday that he plans to step down later this year as Berkshire Hathaway's CEO has renewed focus on his legacy and influence. While he has a devoted following that pores over his stock moves, Buffett has long maintained that average investors shouldn't pick stocks and instead just park their money in an S&P 500 index fund.

Legendary investor Warren Buffett has a devoted following that closely tracks his stock moves, but he has consistently urged most people to do as he says and not as he does.

His surprise announcement Saturday that he plans to step down later this year as Berkshire Hathaway's CEO has renewed focus on his legacy and influence over investors.

For many years, Buffett has preached parking your money in an S&P 500 index fund, rather than trying to outsmart the market by picking individual stocks. In 2007, he famously made a $1 million bet that the index would outperform a collection of hedge funds over the course of 10 years—and won.

When it comes to his personal finances, he also put his money where his mouth is. In his 2013 letter to Berkshire shareholders, he laid out his simple advice to a trustee charged with managing his wealth for his wife upon his death.

"Put 10% of the cash in short-term government bonds and 90% in a very low-cost S&P 500 index fund. (I suggest Vanguard’s.) I believe the trust’s long-term results from this policy will be superior to those attained by most investors—whether pension funds, institutions or individuals—who employ high-fee managers," Buffett wrote.

The soaring popularity of passive investing in recent years, led by index funds, suggests that many Americans have indeed taken his advice to heart.

Still, Buffett's stock moves are also closely watched, and Berkshire's quarterly 13-F filings that reveal what he's buying and selling often move markets, as investors look for possible clues on what to do with their own money.

Buffett's prescience was on display just last month when stocks crashed. His sales of Apple stock last year, which added to Berkshire's massive cash pile, now look especially well timed given the market selloff triggered by President Donald Trump's tariffs.

On Saturday morning, before he dropped his bombshell that he wants Greg Abel to take over as CEO by year's end, Buffett tacitly acknowledged that his investing activity for his Berkshire contrasts with his advice.

"We have made a lot of money by not wanting to be fully invested at all times, and we don't think it's improper actually for people who are passive investors just to make a few simple investments and sit for their life in them," he told shareholders during a question-and-answer session at the annual meeting.