Home Stock Market Commentary Why Warren Buffett dumped Berkshire Hathaway’s shares of Costco – Source –... Stock MarketStock Market Commentary Why Warren Buffett dumped Berkshire Hathaway’s shares of Costco – Source – Yahoo Finance (11/24/2020) By wsw staff - November 24, 2020 Yahoo Finance’s Brian Sozzi and Myles Udland weigh in on Berkshire Hathaway getting out of their Costco position.