Key Points Warren Buffett has kept trimming his Bank of America and Apple investments. The investor is using the proceeds to buy short-term Treasury bonds. Investors looking to diversify their portfolios in a bull market can do the same. These 10 stocks could mint the next wave of millionaires › Warren Buffett may be retiring at the end of 2025, but he is still fully in charge of the Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) stock portfolio today. The 95-year-old investor runs Berkshire Hath ...