Movers Roundup: GM, American Express

Among the stock activity stories for Tuesday, May 26, from AP Financial News:

NEW YORK (AP) — Shares of General Motors Corp. fluctuated Tuesday as the automaker detailed a tentative labor agreement with the United Auto Workers, though an important deadline loomed for a deal that would let GM avoid government-mandated bankruptcy.

NEW YORK (AP) — Shares of American Express Co. gained Tuesday afternoon, while an analyst raised his earnings estimates for the credit card lender.

PHILADELPHIA (AP) — Shares of Altera Corp. rose Tuesday after an analyst raised his earnings estimates for the chipmaker, based on his expectation that the company will boost its second-quarter forecast during a mid-quarter update.

NEW YORK (AP) — Shares of Foot Locker Inc. rose on Tuesday after an analyst upgraded the athletic footwear and apparel retailer on strong first-quarter earnings and expectations of continued improvement in its operating structure.