Kroger stock soars after Buffett’s investment

Kroger Co.’s stock soared in after-hours trading Friday following the disclosure that famed investor Warren Buffett’s Berkshire Hathaway conglomerate has made a huge investment in the supermarket giant’s stock. Omaha, Neb.-based conglomerate Berkshire Hathaway bought a new position of 18.9 million shares of Kroger (NYSE: KR) stock during the fourth quarter, according to a Securities and Exchange Commission filing late Friday. It didn’t own Kroger stock before last quarter. That stake was…