In December last year, US-based Bats and Chi-X Europe, which operate alternative electronic trading systems, entered into exclusive negotiations.
At the time it was reported that Bats had offered about $300m for the European company and that the deadline for reaching an agreement was 11 February 2011.
In a statement Bats said that there will be no further public statements at this time.
Last week has witnessed a series of merger and acquisition news in the global equity trading sector.
London Stock Exchange and Canada’s TMX Group agreed to merge and create a new transatlantic exchange.
Also, Deutsche Boerse announced that it is in advanced merger talks with NYSE Euronext.
