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SIE Regulators and Market Participants Guide

SIE guide to the SEC, FINRA, the Federal Reserve, state regulators, clearing agencies, and other market participants in U.S. securities markets.

Use this section when you need the SIE version of U.S. market oversight and market-participant basics. Start with the core regulators first, then move into self-regulatory organizations, state regulators, exchanges, clearing agencies, issuers, broker-dealers, and the institutional participants that appear repeatedly in SIE questions.

In this section

Revised on Thursday, April 23, 2026