Stocks wrapped up their best week since November on Friday as Citigroup said it did not need any more government aid and a broker upgraded Merck & Co, saying its deal to buy a rival was shrewd.

The Dow Jones industrial average <.DJI> gained 53.92 points, or 0.75 percent, to end unofficially at 7,223.98. The Standard & Poor's 500 Index <.SPX> rose 5.81 points, or 0.77 percent, to 756.55. The Nasdaq Composite Index <.IXIC> added 5.40 points, or 0.38 percent, to 1,431.50.

(Reporting by Deepa Seetharaman; Editing by Jan Paschal)

Citigroup Merck & Co.