Warren Buffett is tech’s most famous skeptic. So when a quarterly securities filing revealed late Friday that Buffett’s Berkshire Hathaway has taken a first-ever, multibillion stake in Alphabet, the parent company of Google, investors sat up and took notice. Shares of Alphabet rose about 5% heading into Monday's market open. The new Berkshire position became public following an almost 50% rally in Google stock so far this year — all the more surprising because Berkshire's investor team is well known for w ...