Shares of UnitedHealth Group Inc (NYSE:UNH) are surging 10.1% to trade at 298.71thismorning,afteraSecuritiesandExchangeCommission(SEC)filingshowedthatWarrenBuffett′sBerkshireHathaway(BRK.A)hadpurchasedastakeinthecompany,alongsideLennar(LEN)andD.R.Horton(DHI).Lastquarter,around5millionshareswereboughtforapproximately1.6 billion. In response to the news, the equity is eyeing its biggest daily pop since March 2020.This boost in sentiment trails several years of strug ...