Warren buffett’s birthday current arrived early this yr. On August twenty eighth, two days earlier than America Inc’s favorite great-grandpa turned 94, his bricks-to-motor-insurance conglomerate, Berkshire Hathaway, reached a market worth of $1trn. It turned solely the eighth American firm to say that title and, as a toddler of the Nebraskan heartland, the primary to not emerge from the west-coast tech scene. Its class-A shares now change arms for $715,000, 55,000 occasions what they have been price when Mr Buffett took management of a struggling textile mill in 1965. In that interval the entire return, together with dividends, of the S&P 500 index of America’s greatest companies has risen simply 400-fold. When Berkshire’s longtime shareholders want Mr Buffett many completely happy returns, his usually folksy response is likely to be: proper again at ya.