The trading room of the stock market is photographed in Frankfurt, Germany, Tuesday, Feb. 23, 2016. The London Stock Exchange and Deutsche Boerse are discussing the potential of a merger. If the deal goes through, Deutsche Boerse would hold 54.4 percent of the combined group. The proposal is the third time the two companies have tried to merge. The previous efforts in 2000 and 2004 collapsed. (AP Photo/Michael Probst)