Weinberg said hedge funds accounted for roughly 40% of turnover in German securities. Other debt agency officials said regulation following the global financial crisis had prompted banks to be more cautious about investing in bonds, which also left hedge funds with greater scope to buy into fixed income markets. UK debt management office head Robert Stheeman said hedge funds had moved into the space left by banks in ensuring liquidity - in other words, the ease of buying and selling an asset. Mercedes Abascal Rojo, head of funding and debt management at the Spanish Treasury, urged the need for caution, however. So far, market functioning has generally been smooth, the debt agency heads said.

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Persons: Heiko Becker, Thomas Weinberg, Weinberg, Robert Stheeman, Mercedes Abascal Rojo, Spain's Abascal, Dhara, Barbara Lewis Organizations: European Central Bank, REUTERS, Bank of England, Association for Financial Markets, Spanish Treasury, Thomson Locations: Frankfurt, Germany, Ukraine, Europe's, Brussels, Central, Spain