Warren Buffett’s Berkshire Hathaway Inc. slashed its exposure to big-bank shares in the first quarter, liquidating its position in Citigroup Inc. and trimming positions in Bank of America Corp. and Capital One Financial Corp., according to a regulatory filing on Thursday.

Warren Buffett’s Berkshire Hathaway sold its shares of Citigroup during the first quarter, while trimming its stakes in Bank of America and Capital One.

So when Warren Buffett and Berkshire Hathaway make a move, people pay attention. Recently, Berkshire Hathaway has been piling into short-term U.S. Treasury bills. Berkshire curren