Site Feedback

Website Feedback

This contact form is only for website help or website suggestions. If you have questions or comments regarding a published document please contact the publishing agency. Comments or questions about document content can not be answered by OFR staff. Please do not provide confidential information or personal data.

Title 17

Displaying title 17, up to date as of 6/15/2026. Title 17 was last amended 6/08/2026.
view historical versions
  1. Title 17 —Commodity and Securities Exchanges
  2. Chapter II —Securities and Exchange Commission
  3. Part 242   View Full Text
  • Details
  • Print
  • Search
  • Subscribe
  • Timeline
  • Go to Date
  • Published Edition
  • Developer Tools
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Title 17Commodity and Securities ExchangesPart / Section
Chapter IISecurities and Exchange Commission200 – 399
Part 242Regulations M, Sho, ATS, AC, NMS, SE, and SBSR, and Customer Margin Requirements for Security Futures242.100 – 242.1007
Regulation M242.100 – 242.105
§ 242.100Preliminary note; definitions.
§ 242.101Activities by distribution participants.
§ 242.102Activities by issuers and selling security holders during a distribution.
§ 242.103Nasdaq passive market making.
§ 242.104Stabilizing and other activities in connection with an offering.
§ 242.105Short selling in connection with a public offering.
Regulation SHO—Regulation of Short Sales242.200 – 242.204
§ 242.200Definition of “short sale” and marking requirements.
§ 242.201Circuit breaker.
§ 242.203Borrowing and delivery requirements.
§ 242.204Close-out requirement.
Regulation ATS—Alternative Trading Systems242.300 – 242.304
§ 242.300Definitions.
§ 242.301Requirements for alternative trading systems.
§ 242.302Recordkeeping requirements for alternative trading systems.
§ 242.303Record preservation requirements for alternative trading systems.
§ 242.304NMS Stock ATSs.
Customer Margin Requirements for Security Futures242.400 – 242.406
§ 242.400Customer margin requirements for security futures—authority, purpose, interpretation, and scope.
§ 242.401Definitions.
§ 242.402General provisions.
§ 242.403Required margin.
§ 242.404Type, form and use of margin.
§ 242.405Withdrawal of margin.
§ 242.406Undermargined accounts.
Regulation AC—Analyst Certification242.500 – 242.505
§ 242.500Definitions.
§ 242.501Certifications in connection with research reports.
§ 242.502Certifications in connection with public appearances.
§ 242.503Certain foreign research reports.
§ 242.504Notification to associated persons.
§ 242.505Exclusion for news media.
Regulation NMS—Regulation of the National Market System242.600 – 242.614
§ 242.600NMS security designation and definitions.
§ 242.601Dissemination of transaction reports and last sale data with respect to transactions in NMS stocks.
§ 242.602Dissemination of quotations in NMS securities.
§ 242.603Distribution, consolidation, dissemination, and display of information with respect to quotations for and transactions in NMS stocks.
§ 242.604Display of customer limit orders.
§ 242.605Disclosure of order execution information.
§ 242.606Disclosure of order routing information.
§ 242.607Customer account statements.
§ 242.608Filing and amendment of national market system plans.
§ 242.609Registration of securities information processors: form of application and amendments.
§ 242.610Access to quotations.
§ 242.611Order protection rule.
§ 242.612Minimum pricing increment.
§ 242.613Consolidated audit trail.
§ 242.614Registration and responsibilities of competing consolidators.
Regulation SE—Registration and Regulation of Security-Based Swap Execution Facilities242.800 – 242.835
§ 242.800Scope.
§ 242.801Applicable provisions.
§ 242.802Definitions.
§ 242.803Requirements and procedures for registration.
§ 242.804Listing products for trading by certification.
§ 242.805Voluntary submission of new products for Commission review and approval.
§ 242.806Voluntary submission of rules for Commission review and approval.
§ 242.807Self-certification of rules.
§ 242.808Availability of public information.
§ 242.809Staying of certification and tolling of review period pending jurisdictional determination.
§ 242.810Product filings by security-based swap execution facilities that are not yet registered and by dormant security-based swap execution facilities.
§ 242.811Information relating to security-based swap execution facility compliance.
§ 242.812Enforceability.
§ 242.813Prohibited use of data collected for regulatory purposes.
§ 242.814Entity operating both a national securities exchange and security-based swap execution facility.
§ 242.815Methods of execution for Required and Permitted Transactions.
§ 242.816Trade execution requirement and exemptions therefrom.
§ 242.817Trade execution compliance schedule.
§ 242.818Core Principle 1—Compliance with core principles.
§ 242.819Core Principle 2—Compliance with rules.
§ 242.820Core Principle 3—Security-based swaps not readily susceptible to manipulation.
§ 242.821Core Principle 4—Monitoring of trading and trade processing.
§ 242.822Core Principle 5—Ability to obtain information.
§ 242.823Core Principle 6—Financial integrity of transactions.
§ 242.824Core Principle 7—Emergency authority.
§ 242.825Core Principle 8—Timely publication of trading information.
§ 242.826Core Principle 9—Recordkeeping and reporting.
§ 242.827Core Principle 10—Antitrust considerations.
§ 242.828Core Principle 11—Conflicts of interest.
§ 242.829Core Principle 12—Financial resources.
§ 242.830Core Principle 13—System safeguards.
§ 242.831Core Principle 14—Designation of chief compliance officer.
§ 242.832Application of the trade execution requirement to cross-border security-based swap transactions.
§ 242.833Cross-border exemptions.
§ 242.834Mitigation of conflicts of interest of security-based swap execution facilities and certain exchanges.
§ 242.835Notice to Commission by security-based swap execution facility of final disciplinary action or denial or limitation of access.
Regulation SBSR—Regulatory Reporting and Public Dissemination of Security-Based Swap Information242.900 – 242.909
§ 242.900Definitions.
§ 242.901Reporting obligations.
§ 242.902Public dissemination of transaction reports.
§ 242.903Coded information.
§ 242.904Operating hours of registered security-based swap data repositories.
§ 242.905Correction of errors in security-based swap information.
§ 242.906Other duties of participants.
§ 242.907Policies and procedures of registered security-based swap data repositories.
§ 242.908Cross-border matters.
§ 242.909Registration of security-based swap data repository as a securities information processor.
Regulation SCISystems Compliance and Integrity242.1000 – 242.1007
eCFR Content