FINRA Proposes Intraday Margin Standards Replacing Day Trading Rules

FINRA has filed a proposed rule change (SR-FINRA-2025-017) with the SEC to amend FINRA Rule 4210, specifically replacing the current day trading margin provisions with new intraday margin standards. This action involves eliminating existing paragraphs related to day trading margin requirements and establishing new paragraphs for intraday margin calculations. The proposal aims to modernize margin requirements for day trading activities.

Broker-dealers and fund managers will need to review the proposed changes to understand how intraday margin calculations will differ from current day trading rules. While no specific compliance deadline is provided in this initial filing, regulated entities should monitor the SEC's review process and prepare for potential new obligations once the rule is finalized. The Federal Register Notice indicates a longer period for Commission action, suggesting the comment period and finalization may take some time.