Which of the following entities is considered a self-regulatory organization?

The Municipal Securities Rulemaking Board, or MSRB, is a self-regulatory organization. An SRO is a regulatory body authorized to create and enforce rules for its members or market participants under the broader oversight of the Securities and Exchange Commission. The MSRB writes rules governing municipal securities dealers, municipal advisors, and related market conduct. Choice C is correct because the MSRB is specifically identified in the SIE outline as an SRO, along with FINRA and CBOE. The SEC is not an SRO; it is the federal securities regulator with statutory authority under federal securities laws. SIPC is not an SRO; it provides limited protection to customers if a brokerage firm fails financially, subject to SIPA. The Department of Justice is a federal law enforcement agency and is not part of the securities industry’s self-regulatory structure. This question tests the distinction between government regulators, investor protection entities, and self-regulatory organizations. The official outline states that SIE candidates must know the “purpose and mission of an SRO” and the “jurisdiction and authority of SROs,” including MSRB. Reference: Section 1.1.2 Self-Regulatory Organizations; Section 1.1.3 Other Regulators and Agencies.