On December 14, 2022, the US Securities and Exchange Commission (SEC) proposed a fundamental restructuring of the US equity markets in the form of two rule amendments and one new rule proposal (the Equity Market Proposals). In addition, the SEC proposed new Regulation Best Execution (Proposed Regulation Best Ex) under the Securities Exchange Act of 1934 (Exchange Act). The comment period for each rule proposal will remain open until the later of March 31, 2023, or 60 days after the applicable proposing release is published in the Federal Register.