London Stock Exchange (LSE) CEO Xavier Rolet (R) speaks as TMX Group CEO Tom Kloet (L) is reflected at a press conference regarding the merger of the TSX and the LSE in Toronto, February 9, 2011. The LSE is to buy Canada's TMX to claw back lost market share and create the world's fourth-largest bourse trading $4.1-trillion of stock a year. (MARK BLINCH/Mark Blinch/Reuters) TIMELINE TMX and LSE: From proposal to collapse Add to ... The Globe and Mail Published Wednesday, Jun. 29 2011, 6:45 PM EDT Last updated Thursday, Jun. 30 2011, 6:11 AM EDT 2 comments Print AA The months after a proposal to merge TMX Group Inc. and London Stock Exchange PLC. were eventful. Here are the highlights leading up to the merger's collapse.