European shares extended the week's rally to a fourth day as stronger commodity and pharmaceutical shares outpaced a sharp decline in banks, pulled down by uncertainty over details over the rescue plan for Greece. On Wall Street, all three major indexes advanced, also buoyed by data that indicated the US labor market may be healing.
European leaders agreed to provide financial aid to Greece, but details on the package, which leaked from multiple sources, were not expected until early next week when European Union finance ministers meet.
The euro extended losses versus the US dollar, falling below $1.3600, as investors expressed concern that the plan may not be enough to pull Greece out from its fiscal crisis.
"The confusion over the bailout is leaving traders a little nervous. It seems now that the EU has made a decision to help Greece, but just what that help entails is still a mystery," said Jimmy Yates, head of equities at CMC Markets.
The pan-European FTSEurofirst 300 index closed up 0.34 percent at 990.51 points.
Shortly after midday, the Dow Jones Industrial Average was up 80.64 points, or 0.80 percent, at 10,119.02. The Standard & Poor's 500 Index was up 7.01 points, or 0.66 percent, at 1,075.14. The Nasdaq Composite Index was up 25.36 points, or 1.18 percent, at 2,173.23.
The costs of protecting against a government debt default by Greece and Portugal rose as possible obstacles for the Greek rescue plan emerged.
Five-year credit default swaps on Greek government debt climbed to 352.0 basis points from 332.5 earlier in the session, according to data from CDS monitor CMA DataVision.
"There is still some nervousness. Markets could also perhaps realize more and more that there may be a bailout but it will come at a cost and the cost is that they really have to be tough on the fiscal side," Klaus Wiener, head of research at Generali Investments, said of expectations of what an aid package for Greece may entail.
"When we look at the pillars of growth that we had over the last months, it was really fiscal spending. Now if countries have to go into reverse, that's not boding well for the growth momentum," he added.
The euro was down 0.50 percent at $1.3657. Against the yen, the dollar was down 0.26 percent at 89.74.
The dollar was up against a basket of major currencies, with the US Dollar Index up 0.14 percent at 80.138.
Gold rose to a near one-week high above $1,090 an ounce.
Spot gold prices rose $19.25 to $1,091.70.
