- US stocks rebounded Monday from their worst week of the year after G8 leaders voiced support for debt-stricken Greece to remain in the eurozone and economic growth efforts.
In the first 45 minutes of trade, the Dow Jones Industrial Average was up 48.78 points, or 0.39 percent, to 12,418.16.
The S&P 500-stock index climbed 6.04 (0.47 percent) to 1,301.26, while the tech-rich Nasdaq added 14.70 (0.53 percent) at 2,793.49.
Wall Street stocks were "supported by a relatively calm eurozone crisis front following a weekend meeting of G8 world leaders that urged Greece to remain a member of the eurozone and that economic growth policies accompany austerity plans," Charles Schwab & Co. analysts said.
Analysts noted that the Group of Eight leaders backed growth measures at the US-hosted summit but did not offer any specific details.
"What policies produce growth over the long term appears not to be a matter for discussion," said Dick Green at Briefing.com.
"For now, there are no decisions as to what action will be taken."
Facebook shares plunged more than 11 percent below the initial public offering price of $38, after fizzling in their debut Friday. The shares were changing hands at $34.05.
On Friday, US stocks slumped after Facebook's IPO disappointed, leaving the Nasdaq down 1.2 percent. In their sixth straight day of losses, the Dow dropped 0.6 percent and the S&P 500 shed 0.7 percent.
There was no major economic indicator on the calendar.
Aerospace giant Boeing led the blue-chip Dow higher, gaining 2.3 percent.
Asset management firm BlackRock dropped 1.5 percent after British bank Barclays said it would seek to sell its $6.1 billion stake.
Yahoo! rose 0.3 percent. The struggling Internet pioneer announced Sunday it would sell its stake in Alibaba, China's top e-commerce player, for at least $7.1 billion.
Lowe's Companies, the nation's second-largest home-improvement retailer, plunged 10.5 percent after reporting better-than-expected profit in the first quarter but lowering its full-year forecast.
The bond market fell. The yield on the 10-year Treasury rose to 1.74 percent from 1.70 percent Friday, while the 30-year fell to 2.81 percent from 2.79 percent.
Bond prices and yields move in opposite directions.