Bank blues: Citigroup was among several banks with declining stocks Friday as investors judged that the Fed's decision not to raise rates mean banks won't be able charge more for loans. Citigroup shares declined 3 percent, to $50.29.

Plunge: Raptor Pharmaceuticals plunged 36 percent to $7.76 Monday after the drug developer said it may scrap development of a liver disease treatment because it failed to pass a key test. The company's stock closed the week at $7.01.

Merger brewing: Beer stocks jumped Wednesday when SABMiller, a major beer maker whose brands include Miller and Foster's, said it received a takeover offer from Anheuser-Busch InBev. U.S.-traded shares of Anheuser-Busch increased 7 percent to $115.48, and closed the week at $114.33. Molson Coors jumped 12 percent, to $81.55, finishing the week at $84.38.

Job cuts: Hewlett-Packard rose 4 percent, to $28.10 Wednesday on the heels of its announcement of 30,000 job cuts, or roughly 10 percent of its workforce. HP shares closed Friday at $26.54.

Pay-per-view: Cablevision, a New York-area cable TV provider, jumped 16 percent, to $33.14 Thursday after agreeing to be bought by the European cable company Altice. The combined company would be the fourth-largest cable company in the U.S. Cablevision shares finished the week at $33.13.

Sales slip: Shares of Sonic Corp., the fast-food chain known for drive-in service, slumped 10 percent to $24.96 Tuesday after the company reported same-store sales growth of 4.9 percent for last quarter. Analysts had expected growth of 5.3 percent. Sonic shares closed Friday at $24.71.