The US Commodity Futures Trading Commission (CFTC) has closed its investigation into Deutsche Bank’s FX business, the bank revealed in its Q3 results today. In May 2015, a number of major banks were fined more than $5.8 billion for practices relating to alleged collusion and manipulation of the spot FX market around the 4pm London Fix, by a number of regulatory authorities, including the CFTC. Deutsche was not one of the firms named in those settlements, but remained under investigation by the CFTC for its FX market practices.