Who Regulates What: SEC, FINRA, NASAA and Your Complaint
A plain-language mapping of which US financial regulator handles which account, product or complaint — and what each one's free research tools actually cover.
The useful answer first: the financial industry is vast, with many types of products, accounts and professionals, and numerous entities responsible for regulation and oversight of those different sectors (c01). For a US retail investor, three names do most of the work in ordinary headlines: the SEC, FINRA and NASAA. Getting the mapping right is what stops a headline from sending you to the wrong door.
The SEC is an independent federal regulatory agency and serves as the primary regulator for protecting investors in the U.S. (c03). FINRA is a not-for-profit organization dedicated to investor protection and market integrity, overseen by the SEC (c07, c08). NASAA members are the state and provincial securities regulators across the U.S., Canada and Mexico (c15).
Who does what, in one table
| Body | Core function | Where it is your first stop |
|---|---|---|
| SEC | Enforces securities laws, sets rules for fair and orderly markets, facilitates capital formation, oversees securities exchanges, brokerage firms and investment advisers (c04); requires public company disclosure and sets disclosure requirements for investment products including mutual funds and ETFs (c05) | Tips or complaints about a brokerage account or an advisory account, or suspected investment fraud (c06) |
| FINRA | Regulates member brokerage firms doing business in the U.S., writes rules, examines for and enforces compliance, registers broker-dealer personnel, provides surveillance and trade reporting, and administers dispute resolution (c08, c09, c10) | Questions or complaints about a brokerage account, or suspected investment fraud (c11); research via BrokerCheck, Fund Analyzer and FINRA Data (c12, c13) |
| NASAA members | Investigate investment fraud in their jurisdictions, license certain investment firms and professionals, and register certain securities offerings available to their region's investors (c17) | Concerns about an investment or financial professional; often your closest resource (c16) |
The distinction headlines blur: federal rule-writer versus membership regulator
The SEC is described as the primary regulator for protecting investors, and its remit explicitly covers overseeing securities exchanges, brokerage firms and investment advisers, plus reviewing registration statements for new securities offerings (c03, c04, c05). FINRA's remit is narrower and more operational: it regulates member brokerage firms, examines for and enforces compliance with FINRA rules and federal securities laws, and runs dispute resolution (c08, c10).
Read a headline saying a firm is "under investigation" and you cannot tell from the words alone which body is acting. The source lists SEC, FINRA and NASAA as separate organizations with separate responsibilities, but a given enforcement matter is not attributed to any one of them in this material (c01, c02). That is an inference about how to read a headline, not a fact the source states.
Research tools, and what they are for
The source names several free resources, and the tool names signal their scope:
- BrokerCheck — research the background of investment professionals, brokerage firms and investment adviser firms (c12). Note that it is described as covering both broker and adviser firms.
- Fund Analyzer and FINRA Data — research investment products (c13).
- Investor education — articles, tools and investing quizzes (c14).
The source also runs an overview of organizations tasked with regulating various segments of the financial industry and protecting and educating retail investors, with examples of free resources they provide (c02). It does not say which tool answers which investor question, so treat the list as a starting point rather than a search manual.
A short routing checklist
- Complaint about a brokerage or advisory account, or suspected fraud? The SEC accepts tips and complaints on both account types (c06), and FINRA also takes questions or complaints about brokerage accounts (c11).
- Need the background of a person or firm? BrokerCheck (c12).
- Comparing a fund or product? Fund Analyzer and FINRA Data (c13).
- Concerned about a local firm or offering? NASAA members investigate fraud in their jurisdictions and license certain firms and professionals, and NASAA provides contact information for your local regulator (c17, c18).
- Not sure where to start? The source frames NASAA members as often your closest resource for concerns about an investment or financial professional (c16).
What the source does not say
This material is an overview, and several things a reader might expect are simply absent. It does not give response timelines, complaint outcomes, or any measure of how often a complaint leads to action. It does not state whether the SEC and FINRA coordinate on a single matter, or whether one body refers cases to another.
It also does not list jurisdiction boundaries in detail — the phrase "certain" appears for firms, professionals and securities offerings registered by NASAA members, and this material does not define that scope (c17). Nor does it cover crypto assets, digital-asset platforms, or any products beyond the mutual funds and ETFs named as examples of disclosure requirements (c05). There is no statement about costs, fees or eligibility for any of the named tools.
Finally, the source describes regulators' mandates, not their performance. It does not say which body is faster, tougher, or easier to reach, and nothing here should be read as a ranking. A headline using "regulator" without a name is ambiguous by construction; the table above is the fix.
Sources
Informational only. Not financial, legal or investment advice. Check the primary sources listed above before you act on anything here.