ISTANBUL -- Rising global securities prices reduced the International Monetary Fund's estimate of bank losses, but banks around the world -- especially in Europe -- still are likely to face additional write-downs of $1.5 trillion by the end of next year, the IMF said.

Overall, the IMF calculates that the global financial crisis will produce $3.4 trillion in losses for financial institutions, between 2007 and 2010, a chunk of which already has been recognized. That estimate is $600 billion less than the IMF forecast in April,...