05:17 PM EDT, 10/31/2024 (MT Newswires) -- Nasdaq (NDAQ) and Cboe Global Markets ( CBOE ) are challenging recent changes in US stock market rules intended to help investors better understand the costs they pay to trade stocks and other securities.

The US Securities and Exchange Commission in September adopted revisions to its national markets system regulations lowering the maximum price securities exchanges charge for market access while also helping investors find the best available price for those costs, particularly with smaller-sized transactions.

Nasdaq and Cboe and other plaintiffs in the case pending in the US Court of Appeals for the Federal Circuit in Washington, D.C., argue the new rules will significantly increase their cost of doing business.

The story was earlier reported by Bloomberg. Cboe told the news outlet that the revised rules fall short of their intended effect and "will inhibit price discovery," leading them to petition a review.

Neither Nasdaq, Cboe nor the SEC immediately returned messages from MT Newswires.