Monday’s biggest gaining and declining stocks

NEW YORK (MarketWatch) � Shares of the following companies made notable moves in Monday�s U.S. stock market:

Advancers

Amylin Pharmaceuticals Inc. AMLN �shares rose 17.5% after U.S. regulators cleared a version of the drug developer�s diabetes shot.

Click to Play Housing crisis drives Fla. presidential politics

WSJ's Arian Campo-Flores take a look at the housing crisis and how it has hit Florida especially hard. He reports resident are looking to presidential candidates for specific remedies. Photo: Jason Henry for The Wall Street Journal

GTx Inc. GTXI �gained more than 49% after Citigroup Inc. doubled its share-price estimate of the developer of a prostate-cancer drug.

The Pep Boys � Manny, Moe & Jack PBY �shares jumped almost 24% to $14.93 after the auto-aftermarket chain said it would be acquired by Gores Group for $15 a share.

Thomas & Betts Corp. �rose 23% to $71.31 after Swiss engineering conglomerate ABB Ltd. ABB � CH:ABBN �said it would a acquire the electrical components maker for $3.9 billion, or $72 a share. U.S.-listed shares of ABB fell 3.3%.

US Airways Group Inc. LCC � advanced 4.2% after Bloomberg News reported Delta Air Lines Inc. DAL �was considering making an offer for the carrier.

Decliners

Cell Therapeutics Inc.�s CTIC �shares lost 18% after the biotechnology firm pulled its new-drug application for its treatment of non-Hodgkin�s lymphoma.

Gannett Co. GCI shares declined 6.9% after the publisher of USA Today and other newspapers reported fourth-quarter earnings.

PharMerica Corp. PMC �shares shed nearly 12% after the Federal Trade Commission on Friday sought to block Omnicare Inc.�s OCR �hostile takeover attempt of the pharmacy-services provider.

Staples Inc. SPLS �shares fell almost 4.9% after Goldman Sachs downgraded the office-supplies retailer to sell from neutral.