Pattern Day Trader
A pattern day trader (PDT) is any investor who executes four or more day trades within five business days in a margin account, triggering FINRA rules that require maintaining a minimum account equity of $25,000.
The pattern day trader (PDT) rule is one of the most commonly encountered regulatory requirements for active retail traders in the United States. It was adopted by FINRA (at the time operating as NASD) in 2001 following the surge in online day trading activity during the late 1990s dot-com boom, when regulators observed significant losses among retail traders engaging in rapid, highly leveraged intraday speculation.
Under FINRA Rule 4210, a pattern day trader is defined as a customer who executes four or more 'day trades' — buying and then selling, or selling short and then covering, the same security within the same trading session — within any five consecutive business days, provided those day trades represent more than 6% of the customer's total trading activity during that period. Once designated a PDT, the trader must maintain a minimum equity of $25,000 in their margin account at all times. If the account falls below $25,000, the trader cannot place new day trades until the balance is restored.
The $25,000 minimum equity requirement can be satisfied with cash, marginable securities, or a combination of both. However, it must be present in the account before the day's trading begins; deposited funds typically take two business days to settle and become available to satisfy the requirement.
PDT rules apply specifically to margin accounts — not cash accounts. Some retail traders circumvent PDT restrictions by using a cash account, in which they can only trade with settled funds. Since cash from stock sales takes two business days to settle (T+2), a cash account trader is naturally limited in how frequently they can trade. Alternatively, some traders maintain multiple brokerage accounts to spread their day trading activity, though this does not technically satisfy the regulatory requirements if a single account triggers PDT status.
International brokers that operate outside U.S. jurisdiction are not subject to FINRA rules and therefore do not enforce the PDT rule, which has led some active traders to use offshore accounts. Investors considering this path should carefully research the regulatory protections — and risks — associated with using non-U.S.-regulated brokers. For most retail investors, the PDT rule serves as an important guardrail, since high-frequency day trading has historically produced poor outcomes for the majority of participants after accounting for commissions and the bid-ask spread.