When it comes to widely followed Wall Street money managers, Berkshire Hathaway's (BRK.A 0.64%) (BRK.B 0.94%) CEO Warren Buffett is in a class of his own. In the roughly six decad

Warren Buffett is known for his investing success, generating market-beating returns over the long run. As chairman, he's helped Berkshire Hathaway deliver a compounded annual gain of more than 19% over 58 years -- that's as the S&P 500 posted a compounded increase of about 10% during that period.

Warren Buffett is a big fan of portfolio concentration and placing large wagers on his best ideas. Kicking off 2025, roughly 80% ($238 billion) of the $297 billion portfolio Buffett is overseeing at Berkshire is invested in just nine unstoppable stocks.

According to Warren Buffett, true leadership isn’t about all that—it’s about setting the tone, staying consistent, and leading with purpose. Buffett, a master of decision-making and long-term vision,

Warren Buffett’s Berkshire Hathaway has sold $133 billion worth of stocks in the first nine months of 2024. The company reduced its stakes in Apple, American Express, and Bank of America, which made up a large portion of its portfolio.

Diversification ranks among the most important components of many investment strategies. However, one of the world's greatest investors isn't gung ho about the idea. Warren Buffett once said, "Diversification is protection against ignorance.