Margin Account

A margin account is a brokerage account in which the broker-dealer lends the investor cash, using the account as collateral, to purchase securities. Margin increases purchasing power and also exposes investors to larger losses. Pattern day trader is not current law.

What investor.gov actually names

The investor.gov glossary lock is the whole definition: a "margin account" is a type of brokerage account in which the broker-dealer lends the investor cash, using the account as collateral, to purchase securities. Margin increases investors' purchasing power, but also exposes investors to the potential for larger losses. That is the object. It is a loan against the account. It is not extra edge, and it is not a fill guarantee.

A cash account is not that object: you pay with cash you have. House rules can be stricter than the rulebook. This page does not list brokers and does not invent a commission, a debit-interest rate, or a house haircut.

Current frame is Rule 4210(d)(2) IMD, not PDT

FINRA Regulatory Notice 26-10 (published April 20, 2026; effective June 4, 2026) replaced the pattern-day-trader framework in its entirety with intraday margin in Rule 4210(d)(2). Members that need more time may phase in through October 20, 2027. As of this glossary (2026-08-25) the amendments are effective; a given member may still be in phase-in. Firm status is TODO:VERIFY — do not list brokers.

The live term is intraday margin requirements. After an IML-reducing transaction, the member determines an intraday margin deficit (IMD) on the customer margin account (other than a good-faith or portfolio-margin account). Real-time blocking is allowed. A single end-of-day calculation is also allowed. Regular maintenance is a separate requirement; (d)(2) supplements it. This page will not invent a house maintenance percentage. TODO:VERIFY the posted house rate with the member.

A typical U.S. margin-account equity minimum is on the order of about $2,000 and is broker-dependent (TODO:VERIFY your firm's house minimum). That figure is a margin-equity floor to use leverage, not a day-trade count, and not "the new PDT." House rules may be higher. Do not teach $2,000 as a DennTech product number.

PDT is historical — do not ship 4× buying power

The pattern day trader rule page is historical only. The former four-or-more day trades in five business days test, the associated day-trading buying-power lore, and the $25,000 equity floor are historical — retired June 4, 2026 under FINRA RN 26-10. There is no PDT flag to work around. Do not publish 4× day-trading buying power as current FINRA math. Intraday buying power is house product, broker-dependent. This page will not compute a 4× notional from a $10,000 account and call it a rule.

A stop-loss order is still a trigger, not a fill. Leverage does not make the trigger a guarantee. Session clocks still bind: Early 4:00 a.m. versus 7:00 a.m. ET is an exchange split. Exchange overnight 9:00 p.m.–4:00 a.m. ET is planned for December 6, 2026, not live. Cboe C1 equity-options Global Trading Hours is TBA. Cite U.S. session hours 2026. Broker overnight is ATS access, not exchange overnight. Do not treat overnight buying power as a live exchange session.

EXAMPLE — size from the stop, not a margin multiple

EXAMPLE only — not a margin call, not an IMD, not a tape print, not a Regulation T quote. Account $10,000. Risk 1% is EXAMPLE, not a required rate → $100 dollar risk. Entry $53.00, stop $51.50 → $1.50 per share. Shares = 100 ÷ 1.50 = 66.666… → 66 shares, round down (actual dollar risk $99; notional 66 × $53.00 = $3,498). Same three lines as dollar risk per share. Run it on the risk calculator (crypto UI; treat the unit as shares, round down). The course spine is Risk Management 101 for Stocks.

That 66-share row is not "what 4210 lets you buy." If house buying power is larger, you still size from the stop; if smaller, the house number binds. Leverage does not increase the dollars you are allowed to lose. There is no live /tools/intraday-margin calculator; IMD is the member's determination.

Instructional leverage contrast, still EXAMPLE, not a cited initial-margin percentage: $5,000 cash posted against a $10,000 long versus $10,000 cash for the same long. A drop to $8,000 is a $2,000 loss either way. On $10,000 cash that is 20% of cash posted. On $5,000 cash plus a $5,000 loan, equity is $3,000 — a 40% hit to cash posted, and you still owe the loan. TODO:VERIFY your firm's actual initial and maintenance numbers; this EXAMPLE does not quote them.

FAQ

What is a margin account?

investor.gov: a brokerage account in which the broker-dealer lends the investor cash, using the account as collateral, to purchase securities. Margin increases purchasing power and exposes investors to the potential for larger losses. It is a loan, not a cash account.

Is the Pattern Day Trader rule still current law?

No. PDT is not current law. RN 26-10, effective June 4, 2026, replaced that framework with Rule 4210(d)(2) intraday margin. The $25,000 day-trade equity floor is historical only. Do not ship 4× buying power as live math.

Is the typical ~$2,000 figure the new PDT?

No. A typical margin-account equity minimum is on the order of about $2,000 and is broker-dependent (TODO:VERIFY your firm's house minimum). It is not a day-trade count and not a DennTech product number.

Does buying power change how I size shares?

It can cap what the member will let you buy. It does not raise the dollar-risk budget. EXAMPLE: $10,000, 1% = $100, $1.50 per share → 66 shares, round down. If house buying power is smaller, the house number binds.

Is there a live intradaily-margin calculator on this site?

No. Do not use a fake /tools/intraday-margin URL. The member computes IMD under written procedures. Use the risk calculator only for stop-distance share counts (crypto UI; unit = shares, round down).

Educational only. Not financial, tax, or legal advice. Not a broker comparison. Margin is credit; you can lose more than you deposit. Cite investor.gov's margin-account glossary, FINRA RN 26-10, and Rule 4210(d)(2). House implementation is TODO:VERIFY per firm.