The major indexes rallied to close out Thursday’s session, with the Dow closing up 2%, the S&P 500 gaining 1.9% and the Nasdaq adding 2.4%.

Here are Thursday’s winners and losers:

Winners

IMS Health Inc. (RX)
Merger news pushed the company’s stock up 23.3% to new yearly highs. RX shares last traded at $20.73, up $3.92 on the day.

Eastman Kodak Co. (EK)
The camera and film manufacturer added 12.9% Thursday. Kodak shares closed at $4.19, a gain of 48 cents on the day.

Dynegy Inc. (DYN)
The utility provider’s shares gained 9.6%, with shares finishing the session at $2.05, a gain of 18 cents on the day.

American International Group Inc. (AIG)
The insurer continued its volatile trading week, with shares rising 8.5% Thursday. AIG shares ended the day at $39.28, a gain of $3.08 on the day.

Wynn Resorts Ltd. (WYNN)
The casino developer rose 8.3% Thursday. WYNN shares last traded at $59.84 up $4.57 on the day.

Losers

CVS Caremark Corp. (CVS)
An antitrust probe by the FTC dropped the pharmacy company’s shares 20.1%. CVS shares closed at $28.87, down $7.28 on the day.

Whole Foods Market Inc. (WFMI)
The green-grocer’s full-year earnings forecast cost the stock 15.5%. Whole Foods finished the session at $27.10, a loss of $4.96 on the day.

MetroPCS Communications Inc. (PCS)
The wireless-communications provider dove 9.2% after releasing its subscription forecast. PCS shares ended Thursday at $6.01, down 61 cents on the day.

CF Industries Holdings Inc. (CF)
The stock fell 7.5% on Thursday as Agrium raised its bid for the company. CF shares last traded at $79.90, a loss of $6.49 on the day.

J.C. Penney Co. Inc. (JCP)
The retailer dropped 5.5% after reporting lower-than-expected quarterly results. JCP shares closed at $30.32, down $1.76 on the day.