MarketWatch recently reported that the IMF's executive board finalized the details of its $430 billion crisis capital fund, which is only to be used if existing funds become significantly depleted. Thus the "crisis" part of the name.
This move comes ahead of Greece's upcoming parliamentary elections and will definitely serve to allay some investor fears about potential financial havoc wrecked by the results of the elections (which will most likely not result in anything extremely negative; secret polls show New Democracy ahead). Moreover, there have been rumors of potential coordinated action from the central banks of major economies of the world, leading the stock market to soar on Friday.