UPDATE 2-U.S. SEC denies Chicago Stock Exchange sale to China-based investors
February 15, 2018 at 23:35 PM EST
Feb 15 (Reuters) - U.S. regulators on Thursday killed the politically sensitive sale of the Chicago Stock Exchange (CHX) to a group led by China-based investors, saying a lack of information on the would-be buyers threatened the ability to properly monitor the exchange after the deal.