Among the stock activity stories for Friday, April 24, from AP Financial News:

NEW YORK (AP) ¿ Shares of nutritional-supplement maker and retailer NBTY Inc. jumped Friday as its fiscal second-quarter profit topped Wall Street expectations, despite the rising costs of raw materials and harm to overseas revenue from the stronger dollar.

CHATTANOOGA, Tenn. (AP) ¿ Shares of CBL & Associates Property Inc. jumped as much as 20 percent Friday after a Goldman Sachs analyst upgraded the shopping mall developer's rating saying its bankruptcy risk is gone because of improved liquidity.

NEW YORK (AP) ¿ Amgen Inc. may have reported its weakest quarter in memory, but shares rose Friday and several analysts said they are still backing the stock because of the biotechnology company's moneymaking potential.

NEW YORK (AP) ¿ Shares of Roper Industries Inc., which makes engineered products for water and energy companies, jumped Thursday after its first-quarter profit beat analyst estimates.

NEW YORK (AP) ¿ Shares of Huron Consulting Group Inc., which provides financial and operational advice to businesses, rose Friday following an upgrade from a Deutsche Bank analyst.

HARTFORD, Conn. (AP) ¿ Shares of Cooper Industries Ltd. rose Friday, a day after the manufacturer of electrical equipment said its first-quarter profit dropped 35 percent, though it slightly beat Wall Street estimates.

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