Nasdaq and Cboe Challenge SEC Over New Stock Trading Rule

  • Exchanges say changes could affect pricing and hurt investors
  • US regulator had passed new rule altering economics of trading

The US Securities and Exchange Commission headquarters in Washington, DC.

Photographer: Tierney L. Cross/Bloomberg
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Nasdaq Inc. and Cboe Global Markets Inc., two of the biggest stock exchanges, challenged a new US Securities and Exchange Commission rule that changes the economic structure of how stocks trade.

The firms asked a court to review the SEC’s recently finalized national market structure regulation, also known as Reg-NMS, according to a petition, which they said was lodged with a United States appeals court in Washington.