 Shares of Atlas Worldwide Holdings AAWW, 12.25 shot up 12.5 toward a four-month high in volatile afternoon trading Monday, after The Wall Street Journal reported that the aircraft and aviation operating services was in advanced buyout talks by a group led by asset management services company Apollo Global Management Inc. The stock, which was up as much as 16.2 earlier in the session, has been halted once for volatility in afternoon trading. The WSJ report, which cites people familiar with the matter, said a deal could come soon, while details of the negotiations couldnt be learned. 