UPDATE 3-Exchange operator CME Group to buy Britain's NEX for $5.5 billion By: Reuters: Company News March 29, 2018 at 09:45 AM EDT * Analysts, shareholders eye counterbids (Adds context on exchange mergers, analyst, lawyer comments, updates share movement) Read More >> Related Stocks: CME Group Eaton Vance New York Municipal Bond Fund Intercontinental Exchange Nexgenrx Inc Triangle Capital Corp