REUTERS/Gonzalo Fuentes/File Photo Acquire Licensing RightsLONDON/DUBLIN, Sept 18 (Reuters) - Societe Generale's (SOGN.PA) much-hyped new strategy plans were given a thumbs down by investors on Monday, underscoring uncertainty over European banks as they face a brittle economy. "There are more questions about the future and the economy," Legras said, adding that transformative mergers between banks, which investors have waited for in vain, remained unlikely. Reuters GraphicsThat dampens the prospects for Europe's banks, whose valuations are low and static, said one adviser who works with top executives from the region's lenders, adding that investors struggle to see much promise for the sector. European banks' modest earning power has dampened investor appetite for their shares, which often trade at just a fraction of book value - the sum of their assets. While in the United States, JP Morgan and Morgan Stanley are valued at around 1.5 times book value, Germany's Deutsche Bank, Dutch lender ABN Amro, France's Credit Agricole and Britain's Standard Chartered are valued at just half book value or less.

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Persons: Gonzalo Fuentes, Jerome Legras, Legras, Slawomir Krupa, Krupa, Goldman Sachs, JP Morgan, Frederic Rozier, Morgan Stanley, Karel Lannoo, Elisa Martinuzzi, John O'Donnell, Alexander Smith Organizations: Societe Generale, La Defense, REUTERS, Reuters, European Central Bank, European Union, Commission, Deutsche Bank, ABN Amro, France's Credit, Thomson Locations: La, Paris, France, DUBLIN, France's, Europe, United States, Germany, Mirabaud, U.S, Brussels