What Berkshire's huge wager on Alphabet says about Warren Buffett's post-CEO role

Warren Buffett is the chairman and former CEO of Berkshire Hathaway. Bloomberg/Getty Images Warren Buffett may no longer be Berkshire Hathaway CEO, but its Alphabet wager has all his hallmarks. Berkshire's third-largest stock bet on June 30 was an almost $38 billion stake in the tech titan. Berkshire recently reported its biggest quarter for stock purchases and buybacks in years. Warren Buffett has left the stage at Berkshire Hathaway, but he may still be pulling strings from behind the…