The euro surged 1.1 percent, poised for its biggest daily jump in eight months, after European leaders agreed on Friday to emergency action to lower borrowing costs of Italy and Spain and to create a single supervisory body for euro area banks.
A summit of the 17-nation currency zone agreed that its rescue funds could be used to stabilise bond markets without forcing countries that comply with EU budget rules to adopt extra austerity measures or economic reforms.
"If what he (European Council chairman Herman Van Rompuy) said was indeed agreed by EU leaders, that would clearly go beyond market expectations and should be enough to stop risk aversion in financial markets," said Hiroki Shimazu, senior market economist at SMBC Nikko Securities.
The common currency soared more than 1.2 percent on a flurry of stop-loss buying to as high as $1.2628, pulling away from a low of 1.2407 marked on Thursday. It later settled around 1.2573.
The leaders also agreed that the bloc's future permanent bailout fund, the European Stability Mechanism (ESM), would be able to lend directly to recapitalise banks without increasing a country's budget deficit, and without preferential seniority status.
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