Warren Buffett's Berkshire Hathaway sold more than $6 billion in stock in April, its first-quarter earnings show

· *Warren Buffett's Berkshire Hathaway netted more than $6 billion from stock sales in April, its first-quarter earnings showed.*
· *The billionaire investor's company was widely expected to deploy a chunk of its $128 billion cash pile last quarter, but instead its reserves grew to $137 billion by the end of March.*
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