Margin and Liquidation

Editorial status: PUBLISHED. AI-assisted educational material; user batch approval recorded on 2026-10-19. Prices, margin requirements and liquidation costs are fictional.

Learning objectives

• Distinguish notional exposure from posted margin.
• Calculate equity under a simple adverse price move.
• Identify why a maintenance threshold is not a guaranteed maximum loss.

Margin supports performance, not ownership

CFTC education explains that futures margin is performance assurance rather than a down payment for physical goods. Initial and maintenance requirements and marking-to-market govern the actual process, and a broker can require more than an exchange minimum. Do not reuse one page's illustrative percentage as a universal rule. CFTC: Futures mechanics

CFTC futures education also warns that leverage can produce losses beyond initial funds. A liquidation mechanism is a response to deteriorating collateral, not a promise that every position closes exactly at its warning threshold. CFTC: Futures basics

Worked example: equity crosses maintenance

Imagine a fictional linear long position for 100 units at 100 each: notional 10,000. Initial margin is assumed to be 1,000 and the teaching maintenance threshold is a fixed 600. Ignore funding and fees initially.

At a price of 98, price loss is 100 × (98 − 100) = −200, so simplified equity is 800. At 95.50 the loss is 450, leaving 550, below the assumed 600 threshold. The model therefore enters its specified margin-call or liquidation process; the example does not determine which action a real broker takes.

If actual closing costs another 40 under the teaching assumptions, remaining equity would be 510. A sudden larger move or unavailable market can produce a different result. The maintenance figure is a trigger in this model, not a guarantee that the holder retains 600 or loses no more than 400.

Notional: 100 × 100 = 10,000
Posted margin: 1,000
Price 98 → loss 200 → equity 800
Price 95.50 → loss 450 → equity 550 < maintenance 600
Execution and costs determine the actual closing result.

Trace the rule and the consumer

An actual system needs the collateral asset, valuation method, haircut if any, initial and maintenance formulas, portfolio offsets, funding, fees, liquidation order and exceptional powers. Cross-margin and isolated arrangements can have different affected balances. Do not infer a user's maximum loss from the UI's leverage number alone.

The price used by the risk engine also matters. A last trade, reference index, mark and executable close price are not automatically identical. A stale or manipulated input can alter a trigger. Ask which source is authoritative, who can change it, and how the system handles outages or disagreements.

A classroom simulator should preserve explicit assumptions and allow failure, reset and assessment. It should not connect to a real exchange or suggest that its simplified formula reproduces every platform. If a planned lab does not exist, the written calculation remains a paper exercise rather than a claimed usable tool.

Common misconceptions

“Ten percent margin means ten percent maximum loss.” Exposure and realized closeout can exceed the initial collateral.

“Maintenance is the exact exit price.” It is a rule threshold; execution can occur differently.

“More collateral makes the asset legally mine.” Collateral and underlying ownership are different relationships.

Risks and limits

No real leverage limit, margin ratio, broker action or liquidation price is supplied. The model omits changing maintenance, portfolio effects, inverse contracts, funding and price gaps. This lesson is education, not suitability advice or a recommendation to trade. No collateral, account or liquidation was tested.

Exercise and answer

Exercise: One hundred units entered at 100 fall to 95.50, with 1,000 initial margin. What is simplified equity, and does a 600 maintenance rule guarantee 600 remains?

Answer: Equity is 550 before other effects. The threshold is breached; it does not guarantee the eventual close price, costs or remaining equity.

Related learning

Complete the commodities track comparison report. Use Labs only according to each actually available model's stated assumptions.

Source map

cftc-futures-mechanics and cftc-futures-basics were actually read on 2026-10-18. They are U.S. consumer education, not universal contract specifications. All quantities, ratios, trigger rules and costs are original teaching assumptions; no real leveraged transaction occurred.