New York and Tokyo, Aug. 28, 2007 The Tokyo Stock Exchange Group, Inc. (TSE Group) today entered into an agreement with NYSE Euronext, which will advise the TSE Group on several key areas of information technology. Initially, NYSE Euronext engineers will work closely with their counterparts at TSE Group to provide detailed information and recommendations on network management and operation, as well as exchange system capacity and performance management, to assure a stable and state-of-the-art trading environment with optimal message capacity.