MADRID, Dec 21 (Reuters) - The European Court of Justice said on Wednesday it had overturned a Spanish court ruling that had capped banks' liabilities for so-called floor clauses in mortgage contracts and asked them to repay customers over the whole life of the loan.
The ruling, announced in a statement, deals a blow to Spanish banks that now have to repay customers beyond what they had lost since May 2013, when Spain's Supreme Court declared these mortgages, whose rates cannot fall below a benchmark, were invalid if they had not been presented clearly.
The new charges could total between 3 billion and 4.5 billion euros ($4.68 billion), according to analysts.
The ruling is final and cannot be appealed.
Shares in Spanish banks fell after the ruling was announced, with Banco Sabadell, down 4.6 percent, leading losses. ($1 = 0.9620 euros) (Reporting by Jesus Aguado; Editing by Angus Berwick)