In an unprecedented legal confrontation, the three biggest U.S. stock-exchange groups are taking on their own regulator to block an initiative that seeks to limit the fees they can charge for trading. Nasdaq Inc. and Cboe Global Markets Inc. on Friday sued the Securities and Exchange Commission in a federal appeals court to stop the regulator from carrying out the program, a day after the New York Stock Exchange filed a similar challenge.

Source: Wall Street Journal February 15, 2019 19:42 UTC