Warren Buffett's Berkshire Hathaway, Inc. (BRK-A) (BRK-B) has recently trimmed its stake in Apple, Inc. (AAPL), but the tech giant has remained its most lucrative bet. At the end of the fourth quarter,

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Apple CEO Tim Cook revealed some much-anticipated details about the impact of President Donald Trump’s trade war on his company, describing a relatively modest increase in costs this quarter. But his response didn’t entirely satisfy Wall Street,