European banks' asset sales face disastrous failure

This sounds a lot like how US banks bundled mortgages together:

European banks are being forced to abandon their efforts to sell off trillions of euros worth of loans, mortgages and real estate after a series of talks with potential investors broke down, leaving many already struggling firms with piles of assets they can barely support.

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Securitisation is at the heart of such arrangements. Assets with low ratings are pooled together into diversified portfolios in order to attain a higher rating. The resulting asset requires less cash and as a result of the higher rating can be more readily pledged to the ECB or to other banks to borrow against.