Nasdaq NLX, the three-year-old London futures venue, has now lost the US exchange operator more than £50 million since its launch, new filings show.

NLX's total operating losses were £11.1 million for the year ended December 31, 2015, according to accounts filed with the UK's Companies House on September 1. These added to losses of £16.5 million in 2014, £17.6 million in 2013 and £5.1 million in 2012.