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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.

Buffett holds steady with Apple, now 26% of Berkshire's portfolio, while trimming Bank of America, signaling cautious views on banking stocks. See more on BRK.A here.