European leaders clinched a deal Thursday they hope will mark a turning point in their two-year debt crisis, agreeing after a night of tense negotiations to have banks take bigger losses on Greece's debts and to boost the region's weapons against the market turmoil. After months of dawdling and half-baked solutions, the leaders had been under immense pressure to finalize their plan to prevent the crisis from pushing Europe and much of the developed world back into recession and to protect their currency union from unraveling. World stock markets surged higher Thursday on the news. Oil prices rose above $92 per barrel while the euro gained strongly — a signal investors were relieved at the outcome of the contentious negotiations. “We have reached an agreement, which I believe lets us give a credible and ambitious and overall response to the Greek crisis,” French President Nicolas Sarkozy told reporters. “Because of the complexity of the issues at stake, it took us a full night. But the results will be a source of huge relief worldwide.” Sarkozy later called his Chinese counterpart Hu Jintao and pledged to cooperate to revive global growth, but there was no word on whether Beijing might contribute to Europe's bailout fund. The fund's chief executive is due to visit Beijing on Friday to talk to potential investors. Beijing has expressed sympathy for the 27-nation European Union, its biggest trading partner, but has yet to commit any cash.