Among the stock activity stories for Tuesday, March 29, from the Associated Press:
_ Shares of Phillips-Van Heusen Corp. jumped following a strong fourth-quarter report that got a boost from its $3 billion acquisition of Tommy Hilfiger.
_ Shares of China-based chemical producer Gulf Resources Inc. surged after an analyst initiated coverage of the stock with a "Buy" rating.
_ Shares of AK Steel Holding Corp. rose after hedge fund titan Steven A. Cohen disclosed a 4.8-percent stake in the steel producer.
_ Shares of Quest Diagnostics Inc. rose as a Credit Suisse analyst said a combination that includes potential volume increases and low expectations bodes well for the medical laboratory operator's stock.