Shares of the sportswear giant got a boost from Bill Ackman.Shares of Nike (NKE 4.14%) were moving higher today after investors responded favorably to news that Bill Ackman's Pershing Square Capital Management Fund had taken a stake in the company, which was reported in Pershing Square's 13-F filing last night. As a result, shares of Nike were up 3.8% as of 11:43 a.m. ET on Thursday.Nike's starting to look like a value stockAckman is one of the most respected and attention-grabbing fund managers on Wall Str ...