When you buy or sell securities, there's a settlement period before the transaction is finalized. The settlement period is the window of time between when the buyer pays for the security and when they actually take ownership. Currently, the settlement period for most securities is T+2, or "trade date plus two days," but in 2024, that will be shortened to T+1, or "trade plus two days." Let's unpack what all this means for you and your investments.

What is a settlement period?
A settlement period is the time between when you buy a security and when your brokerage firm receives your payment. Under the current T+2 rule, investors have two business days after executing a trade to settle the transaction.
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What if you violate the settlement rules?
A settlement violation occurs when there are insufficient funds to cover a securities purchase. The SEC has three levels of settlement violations:
- Good faith violation. You buy a stock with unsettled funds, then sell it before the funds have settled. If you incur three violations within a 12-month period, your brokerage firm may restrict your account so that you can only make trades with settled funds for 90 days.
- Freeriding violation: You buy a stock with unsettled funds, then sell it to cover the cost of your purchase. For instance, if you bought $1,000 worth of Company XYZ on a Monday, under the T+2 rule, you'd have until Wednesday to sell. A freeriding violation occurs if you sell your Company XYZ shares for $1,100 on Thursday and use that money to cover the purchase. A single violation can result in your account being restricted to trading with settled funds for 90 days.
- Cash liquidation violation: You buy a stock, then cover the purchase by selling another security afterward. The violation occurs because you don't have settled funds to cover the cost by the settlement date. Three violations in a 12-month period will result in your brokerage restricting your account to using settled funds for 90 days.
Failing to settle a transaction by the settlement date can also result in your account being frozen, interest and penalty charges, forced na of assets, and legal action.
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Example of a settlement period
Suppose you buy $10,000 worth of Company ABC shares on a Wednesday. You'd have until the end of Friday to deposit enough funds to cover the purchase under the T+2 rules. But that window will shrink to one day when T+1 takes effect in 2024, meaning you'd have to settle it by Thursday. If you're the seller in this transaction, you'd have until Friday to deliver the stock certificate under T+2, or Thursday under T+1.
But let's say on Thursday, you sell shares of Company XYZ for $11,000. The ABC transaction remains unsettled by Friday. But the funds from the XYZ sale won't settle until Monday. Because you didn't have settled funds to cover the purchase -- even though the XYZ sale will cover the cost -- you've committed a cash liquidation violation.