Citigroup has been fined €5,000 ($6,116) by Eurex, the Swiss-German derivatives exchange, but cleared of breaching its rules after a futures trade last August that sparked a criminal probe by German prosecutors.

The bank, which is still facing a fine from the Financial Services Authority for a related bond trade, said it was penalised for"'failing to register one of its traders on a timely basis with Eurex."