Deutsche Bank's London branch was fined £4.7 million on Thursday by the UK's Financial Conduct Authority for putting the wrong buy and sell markers on millions of transactions in regulatory reports.

The markets watchdog said around 29.4 million equity derivative contracts written by the bank between Nov. 5, 2007 and April 19, 2013 were misreported, indicating "buy" when they should have said "sell" and "sell" when they should have said "buy".