blackstone inc bx stock fell 1 in premarket trades on thursday after the private equity firms said its fourthquarter net income fell to 5579 million or 75 cents a share from 14 billion or 192 a share in the yearago quarter distributable earnings fell to 107 a share in the fourth quarter from 517 a share last year but beat the analyst estimate of 95 cents a share according to estimates compiled by factset fourthquarter revenue dropped to 17 billion from 576 billion total assets under management rose 11 to 9747 billion