AOL Time Warner Stock Hits Post-Merger Low "AOL Time Warner's stock has plunged 10 percent over the last two days, as investors have grown concerned about the company's balance sheet, turmoil in its Internet unit and stock sales by a big shareholder. ... The stock closed yesterday at $19.60 in heavy trading, piercing the $20 mark for the first time since late 1998, more than a year before AOL announced plans to acquire Time Warner."