Movers roundup: Chipotle, MEMC

Among the stock activity stories for Thursday, July 24, from AP Financial News:

NEW YORK (AP) _ A slew of downgrades led shares of Chipotle Mexican Grill Inc. to drop Thursday after the burrito chain reported its second quarter profit rose 23 percent but missed Wall Street's expectations by a penny.

NEW YORK (AP) _ Shares of MEMC Electronic Materials Inc. sank to a new low Thursday, after the silicon wafer maker's second-quarter results missed Wall Street forecasts and the company issued a cautious outlook for the third quarter.

NEW YORK (AP) _ Shares of Sierra Wireless Inc. tumbled Thursday after the Canadian wireless modem maker issued a disappointing third-quarter outlook, saying it expects sales of embedded products to PC makers to erode.

BROOMFIELD, Colo. (AP) _ Shares of plastic and metal packaging company Ball Corp. fell Thursday after its second-quarter net income fell 5.6 percent on higher costs and weaker profit margins from its European beverage can business, but analysts said the decline was a buying opportunity.