PAPANDREOU IN TROUBLE: Prime Minister George Papandreou faced a confidence vote late Friday that could result in his government being thrown out. Investors worry that the political turmoil could prevent Greece from adopting austerity measures needed to avoid a default.

GROUPON JUMPS: Internet darling Groupon Inc. jumped 31 percent in its stock market debut, to $26.11. The pioneer of online group discounts priced at $20 late Thursday.

THE DOW: The Dow Jones industrial average closed down 61 points Friday and fell 2 percent for the week, its first weekly loss since September.