Why 46% of Bill Gates' fund is now concentrated in just 2 stocks

Bill Gates built one of the world's most valuable software companies, and yet the trust that funds his foundation no longer owns a single Microsoft share. That sounds dramatic, but the more revealing detail is what remains inside the Gates Foundation Trust: a public equity portfolio of roughly $33 billion, with about 46% now sitting in just two stocks: Berkshire Hathaway and Waste Management.