Why are UnitedHealth Group’s Shares Surging in Premarket Trading Today?

UnitedHealth Group shares surged over 12% in premarket trading after Warren Buffett's Berkshire Hathaway disclosed a new $1. 57 billion stake. source: https://tokenist.com/why-are-unitedhealth-groups-shares-surging-in-premarket-trading-today/?utm_source=rss&utm_medium=rss&utm_campaign=why-are-unitedhealth-groups-shares-surging-in-premarket-trading-today