Greek shares closed 5.68 percent higher on Friday after a suprisingly robust deal in Brussels to fight the eurozone debt crisis.
The Athex index stood at 611.16 points, led by a jump of 12.72 percent by banking shares as measured on the FTSEB index.
Among the chief Greek lenders, Eurobank rose by 15.85 percent, Alpha Bank picked up 14.55 percent, Piraeus Bank increased by 13.60 percent and National Bank was up 12.90 percent.
World stock markets surged overall and the euro jumped against the dollar after an EU summit delivered surprise emergency measures.
The accord struck in Brussels paves the way for the eurozone's 500-billion-euro ($630 billion) bailout fund to recapitalise ailing banks directly, without passing through national budgets and adding to struggling countries' debt mountains.