Warren Buffett's Berkshire Hathaway reported 2nd-quarter earnings on Saturday. Here are the 5 key takeaways.

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· *Warren Buffett's Berkshire Hathaway suffered a 10% slump in operating income last quarter, as the coronavirus pandemic hammered many of its businesses.*
· *It also sold the most shares in at least a decade, repurchased a record amount of its own stock, took an almost $10 billion impairment charge on Precision...