Regulators announce rule changes for stock exchanges and futures listings

The Federal Register has published several immediate rule changes proposed by self-regulatory organizations related to major U.S. stock exchanges and futures markets.

The New York Stock Exchange LLC filed a proposal to amend rules 7.35 and 7.35A, according to the Federal Register. These amendments are effective immediately upon filing.

Nasdaq PHLX LLC submitted two separate filings: one to remove all references to the CORE FIX order entry protocol from Equity 4, and another to amend the exchange's transaction fees under Equity 7, Section 3. Both filings are effective immediately as well.

KalshiEX LLC proposed changes to listing standards for security futures products, with the filing also effective immediately.

These filings indicate ongoing regulatory updates to trading protocols, fee structures, and product standards across multiple U.S. financial exchanges, as documented by the Federal Register.

Market participants and legal researchers are advised to consult the official Federal Register editions for detailed information and to verify the rule changes.