The passage clears the way for Italian Premier Silvio Berlusconi to step down. Berlusconi was widely considered an obstacle to serious economic reforms. The yield on Italy's benchmark two-year bond dropped 0.43 percentage point to 5.69 percent. That's a sign bond investors think Italy will succeed in managing its massive debt load.
The Dow Jones industrial average jumped 250 points, or 2.1 percent, to 12,144 as of 3 p.m. Eastern. It closed below 12,000 the previous two days.
Together with a 112-point gain the day before, the Dow has now made up most of the 389-point plunge it had on Wednesday. That sell-off was triggered by a spike in Italy's borrowing costs and a breakdown in talks to name a new prime minister in Greece.
In Greece, too, there was good news for the markets Friday. Lucas Papademos, a former central banker, was sworn in as interim prime minister. Lucas Papademos took over a coalition government after a two-week political crisis that jeopardized the country's ability to continue receiving emergency loans.
Plenty of uncertainty still hangs over financial markets. Brian Gendreau, senior investment strategist at Cetera Financial Group, noted that the VIX index is still above 30, a sign that traders expect stocks to stay volatile.
Gendreau expects the S&P 500 to trade in a range of 1,200 to 1,275 until Europe's debt crisis looks closer to resolution and the U.S. Congress signs off on a larger debt-cutting plan. A supercommittee in Congress has until Nov. 23 to agree on a deficit-reduction package of at least $1.2 trillion over a decade.
"We still don't have a real resolution on either side of the Atlantic," Gendreau said.
The S&P 500 rose 23, or 1.8 percent, to 1,262. Only 14 of the 500 stocks in the S&P fell. Technology and materials companies had the biggest gains.
Walt Disney Co. jumped 6.3 percent, the biggest gain in the S&P 500. The company reported record annual profits and revenues after the market closed Thursday, thanks to stronger advertising sales at ESPN and the Disney Channel.
Both the S&P 500 and the Dow are now on track for weekly gains. For the week, the S&P is up 1 percent, the Dow 1.6 percent. The Nasdaq composite rose 49, or 1.9 percent, to 2,674. In other corporate news:
- D.R. Horton Inc. returned to a quarterly profit as more people bought houses. But the builder's earnings and revenue fell below what analysts had expected. D.R. Horton's stock dropped 2.2 percent.
- Nordstrom Inc. also reported stronger quarterly profit late Thursday. But the retailer lowered its full-year profit outlook below what analysts expected. Its stock fell 0.9 percent.
- Viacom Inc., the parent of Nickelodeon, said it will move its stock listing to the Nasdaq Stock Market from the New York Stock Exchange next month because it's more "cost effective." The company's class B stock rose 3.6 percent.
- E-Trade Financial Corp. sank 3.5 percent. The online broker said late Thursday that it had decided against putting itself up for sale. E-Trade's largest shareholder, the hedge fund Citadel Advisors, had been pushing for a sale.
U.S. bond trading was closed for Veterans Day.