Among the stock activity stories for Wednesday, Dec. 16, from AP Financial News:
CHICAGO (AP) _ Shares of restaurant owner Darden Restaurants Inc., which operates Olive Garden, Red Lobster and Longhorn Steakhouse, climbed after an analyst upgraded the stock.
NEW YORK (AP) _ Shares of Technitrol Inc. tumbled after the electronics components maker said it will sell $50 million in convertible senior notes in a private offering.
NEW YORK (AP) _ Shares of Achillion Pharmaceuticals Inc. surged after the company said its hepatitis C drug candidate showed positive "proof-of-concept" results, while meeting safety and tolerability goals in an early-stage study.
NEW YORK (AP) _ Shares of Ceragon Networks Ltd. slipped after Wedbush Securities cut the company's rating, saying investors have largely priced in the company's growth potential.