Premarket Roundup: Par Pharma, Analog Devices

Among the premarket stories for Tuesday, August 18, from AP Financial News:

NEW YORK (AP) — Already trading around annual highs, shares of Par Pharmaceutical Cos. rose Wednesday after the Food and Drug Administration approved the company's generic version of the Catapres TTS high blood pressure patch.

NEW YORK (AP) — Chip designer Analog Devices Inc.'s shares declined in premarket trading Wednesday even after it posted a smaller drop in third-quarter profit than Wall Street expected.

INDIANAPOLIS (AP) — A narrowing valuation disparity between the shares of managed care company Cigna Corp. and its competitors led a Credit Suisse analyst to downgrade the stock Wednesday morning.

NEW YORK (AP) — Trading volume at TD Ameritrade Holding Corp. rose in July, but analysts still see challenges ahead for the retail brokerage firm.

NEW YORK (AP) — Steel producer Harsco Corp. has lowered its costs to the point that it can boost profits even if the industry does not fully recover, an analyst said Wednesday, as he upgraded the company's shares.

NEW YORK (AP) — A profitable club base and improving membership mix could bode well for Life Time Fitness Inc.'s fourth quarter, an analyst said Wednesday.