Securities Investor Protection Corporation (SIPC)

The Securities Investor Protection Corporation is a nonprofit membership corporation created by the Securities Investor Protection Act of 1970 to step in when a brokerage firm fails and customer cash or securities are missing. Its statutory charter is unusually blunt about what it is not: 15 U.S.C. 78ccc(a)(1) establishes SIPC as a body corporate that "shall not be an agency or establishment of the United States Government" and gives it the powers of a nonprofit corporation under the District of Columbia Nonprofit Corporation Act. The SEC's own investor education describes it in the same terms, as "a non-government entity."

Two naming points are worth settling at the start, because both cause real confusion. The Act is the Securities Investor Protection Act, usually shortened to SIPA; the Corporation is SIPC, the body the Act created. They are a statute and an organization, not two names for one thing. And SIPC is not an insurer. It responds to the failure of a brokerage firm by restoring what should have been in the account, which is a different event from an investment falling in value, and no premium the customer pays buys protection against the second.

Membership is a status conferred by registration, and the exceptions are the part nobody reads. Under 15 U.S.C. 78ccc(a)(2)(A), SIPC's members are all persons registered as brokers or dealers with the SEC, other than three excluded groups: firms whose principal business is conducted outside the United States, firms registered under a specific limited-purpose provision, and firms whose business "consists exclusively of" distributing shares of registered open-end investment companies or unit investment trusts, selling variable annuities, the insurance business, or advising registered investment companies and insurance company separate accounts. That third exclusion is the practical one: a firm through which someone buys only mutual fund shares or a variable annuity may sit outside SIPC entirely. The SEC's guidance closes the loop by pointing out that firms are required by law to tell you if they are not members, that SIPC publishes a searchable membership database, and that the clearing firm behind the one you deal with should be checked too.

What a liquidation actually looks like. When a member firm fails, SIPC asks a court to appoint a trustee to supervise the firm's liquidation and process customers' claims. Customers file claims with the trustee, who works from the failed firm's own books and records; positions are often transferred in bulk to a solvent firm rather than sold. Only after the customer property actually held by the failed firm has been distributed does SIPC's advance come into play, and that advance is capped at $500,000 for each customer, with claims for cash separately limited to a standard maximum cash advance amount of $250,000. The mechanism behind those two figures, which is more favorable to large accounts than the numbers suggest, is worked through under the brokerage account.

The $250,000 was re-examined in 2026 and deliberately left alone. SIPA requires SIPC's board to decide every five years whether to adjust the cash figure for inflation, subject to the SEC's approval. In an order published on 31 March 2026, the SEC approved the board's determination not to adjust it, so the amount remains $250,000 beginning 1 January 2027 and for the five-year period after that. The order records that applying SIPA's inflation formula would have raised the figure by $100,000, to $350,000, and that the board weighed several factors against doing so, among them the limited benefit an increase would deliver to retail customers and the parity between SIPC's figure and the FDIC's standard maximum deposit insurance amount, which also stands at $250,000. That parity is not a coincidence: the Dodd-Frank Act raised SIPC's cash figure from $100,000 to $250,000 specifically to align it with the FDIC limit, which is a large part of why the two protections get confused with each other.

Unauthorized trades are the hardest claims to make, and the fix is clerical. The SEC describes coverage for unauthorized transactions as one of the most frequent and most difficult issues a trustee has to resolve. To qualify, the investor has to demonstrate that the trade was in fact unauthorized, and the SEC's guidance is that a written complaint to the firm, sent as soon as the transaction is noticed, is usually the only way to prove the complaint was made at all. Doing nothing, or being talked into ratifying the trade after the fact, leaves the customer trying to prove a negative years later in front of a trustee who has only the firm's records to work from.

A member firm fails or is in danger of failing. SIPC applies to a federal court, which appoints a trustee to take over the firm and run the liquidation. The trustee gathers the customer property the firm actually holds, publishes notice, and sets a deadline for customers to file claims. Accounts are reconstructed from the firm's records, positions are often moved wholesale to another brokerage, and each customer's claim is measured against what the records show should have been there. Where customer property falls short, SIPC advances money to the trustee to close the gap, within the per-customer cap and the separate cash limit.

A hypothetical example of the question the customer can answer in advance, which is the only part of this process anyone controls. Devendra holds $300,000 of index funds and $20,000 of uninvested cash at a firm he found online. If that firm is a member, its failure would be handled as a SIPA liquidation, his claim would be measured against the firm's records, and SIPC's advance would be available to fill a shortfall. If the firm is outside SIPC, none of that machinery exists for him: there is no trustee appointed at SIPC's request, no claims process, and no advance, whatever the size of the account. The difference is not a matter of degree, and it is checkable in a minute against SIPC's membership database before any money moves.

Note what none of this responds to. If the same $300,000 of funds simply falls to $210,000 because markets fell, no part of the process above is triggered, because the securities are exactly where they should be.

Pros

• Restores custody when a brokerage fails, which is a real risk that an investor cannot diligence away.
• Membership is automatic for SEC-registered brokers and dealers apart from a narrow statutory list, so most retail accounts are inside the system by default.
• Coverage applies per customer and reaches both securities and cash, with accounts held in separate capacities treated separately.
• Membership status is publicly checkable, and non-members are required to disclose that they are not members.
• The cash figure is reviewed every five years under a statutory process with SEC approval, rather than left to drift indefinitely.

Cons

• It protects custody, not value. Nothing about SIPC responds to an investment falling in price, which is the loss investors actually experience.
• The SEC states that it does not provide protection for investment contracts that are not registered with the SEC.
• Firms whose business consists exclusively of selling fund shares, variable annuities or insurance can fall outside membership entirely.
• Claims for unauthorized trades require the customer to prove the trade was unauthorized, and a contemporaneous written complaint is usually the only evidence that exists.
• A liquidation takes time. Access to an account can be interrupted while a trustee reconstructs records, which is a genuine cost even when the eventual recovery is complete.