Warren Buffett's latest moves: Berkshire ups one bank stake and dramatically cuts another

Warren Buffett
Gerry Miller | CNBC

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As the pandemic gripped financial markets, Warren Buffett's Berkshire Hathaway was building its massive cash pile to a record $137 billion. Meanwhile, a regulatory filing Friday showed the conglomerate trimmed some of its holdings and did some small-scale buying during the historic market turmoil.