What it means
When you buy shares through a broker, the broker holds them on your behalf. If that firm fails, the question is whether your assets are safe, and SIPC exists to answer that.
It steps in to arrange the return of customer assets, which are usually held separately from the firm's own property. The protection has limits set by law, with an overall limit per customer and a smaller sub-limit for cash.
Customers who hold assets in different legal capacities, such as an individual account and a joint account, may be treated as separate customers. Because the limits are set by law, they should be checked at the time you need them.
A frequent misunderstanding is that SIPC works like bank deposit insurance. It does not insure against a fall in the value of your shares, and it is not a government agency, although it was created by Congress.
Its role is to restore what was in your account at the time of failure, not to restore what you paid for it. For businesses, the coverage matters when a company holds treasury investments through a broker.
A finance team will often spread holdings across firms so that no single custodian holds more than the protection limit. Many brokers also buy extra insurance that sits above SIPC limits.
SIPC is funded by assessments on its member firms and not by taxpayers in the ordinary course. A claim is made through a liquidation process, and the time it takes depends on how well the failed firm kept its records.
Clean records generally mean quicker returns. It is worth knowing how SIPC differs from other protections.
Banks have their own deposit insurance scheme, futures accounts have separate rules, and some brokers carry private insurance above the SIPC limits. Each protection covers a different type of failure, so it is best to read the terms for each account.
In practice
Real-world examples
Example 1
A small business opens a brokerage account to invest its spare cash. The finance manager checks that the broker is a SIPC member and records the account balance against the protection limit. She keeps an eye on that figure each quarter and moves money if the balance approaches the limit.
Example 2
A family office holds $3,000,000 across three brokers. The adviser splits the money so no single broker holds more than the protection limit, and also asks each broker about any extra insurance it carries. The result is a written treasury policy the family can show its auditors.
Example 3
An investor sees the value of her shares fall by 30% in a market crash and asks whether SIPC will make up the loss. Her adviser explains that SIPC only protects against a broker failing, not against market falls. The protection is about getting back what was in the account, not what it was once worth.
Think of it
The SIPC is like deposit insurance for a bank, but for your investment portfolio. Just as bank insurance protects your cash if the bank fails, the SIPC protects your stocks and bonds if your broker goes bust.
Formula
Calculation
Covered amount = lower of (customer claim, overall limit), subject to the cash sub-limit
For illustration, assume an overall limit of $500,000 with a cash sub-limit of $250,000. A company's account at a failed broker holds $400,000 of securities and $200,000 of cash, so the claim is 400,000 + 200,000 = $600,000. The cash of $200,000 is under the $250,000 sub-limit, and the total is capped at $500,000, so the covered amount is $500,000. The uncovered portion is 600,000 - 500,000 = $100,000, which may be recovered from any remaining estate or extra insurance.Case study
Seen in the real world
Alder Street Securities is an illustrative, fictional brokerage that collapsed after its owner moved client cash into risky personal ventures. Hundreds of customers found they could not access their accounts.
A court-appointed trustee, working under the investor protection process, reconciled the records and transferred most customer accounts to another firm. A small number of customers with balances above the limits had to claim against what remained of the estate.
The illustrative lesson for one affected company was clear. Its treasurer had held $1,200,000 at a single broker, which was well above the protection limit, and she later spread the balance across three custodians and added a quarterly check of every account against the limits.
Watch out
Common mistakes
- Believing SIPC protects against investment losses when it only covers broker failure and missing client assets.
- Assuming SIPC is the same as bank deposit insurance, which has different rules and a different regulator.
- Putting all treasury investments with one broker without checking the balance against the protection limit.
Questions
People also ask
Is SIPC a government agency?
No, it is a nonprofit membership corporation created by Congress, though it works closely with regulators.
Does SIPC cover cryptocurrency or commodity futures?
Generally not, because coverage applies to securities and cash held for purchasing securities, so check what each account actually holds.
How do I know if my broker is covered?
Most registered brokers are members, and SIPC publishes a member list that you can search before opening an account.