What is a margin ratio?
In risk monitoring on crypto trading interfaces, a margin ratio compares eligible collateral equity with position requirements using a product-defined formula. It shows whether collateral can cover risk requirements. Eligible collateral equity is the value available to bear position risk after including unrealized results and applying rules for liabilities or collateral discounts.
“Margin rate” or “margin ratio” can also mean initial or maintenance margin as a proportion of position value. This article discusses account or position risk indicators; the opening proportion in initial margin serves a different purpose.
What do the two calculation directions mean?
Equity in the numerator shows how many times collateral covers requirements; requirements in the numerator show the share of collateral they consume. For the same amounts, their values move in opposite directions.
Use these teaching formulas excluding fees, discounts and other adjustments:
- Equity ÷ maintenance requirement × 100%: equity four times the requirement gives 400%. With unchanged requirements, more equity increases the ratio and coverage surplus.
- Maintenance requirement ÷ equity × 100%: the same requirement is one quarter of equity, giving 25%. With unchanged requirements, more equity lowers the ratio and the share consumed.
Equity is positive in both formulas. They explain direction, not complete formulas interchangeable between platforms.
How do ratios change for a set of amounts?
Suppose maintenance is fixed at 5 USDT and collateral equity is 100, 20 or 5 USDT. USDT is the denomination asset; these are independent hypothetical states, not a claim that actual requirements stay fixed.
At 100, equity covers requirements 20 times; at 20, four times; at 5, they are equal. Written in both directions:
| Collateral equity | Equity ÷ requirement (%) | Requirement ÷ equity (%) |
|---|---|---|
| 100 USDT | 2,000% | 5% |
| 20 USDT | 400% | 25% |
| 5 USDT | 100% | 100% |
In these simplified formulas, 100% means equality in both cases. One approaches it downward from higher values, the other upward from lower ones. Understanding an interface first requires knowing its direction.
How do actual products calculate it, and what does 100% mean?
Actual ratios include product-defined equity adjustments and fees. For example, OKX’s documented multi-currency cross-margin maintenance ratio can be expressed as:
Adjusted equity ÷ (maintenance margin + liquidation fees) × 100%
Adjusted equity is collateral value recognized by platform rules. Some assets are discounted rather than fully counted, so it need not equal all displayed market values simply added together. See margin for collateral treatment.
Here, 100% means adjusted equity exactly covers maintenance plus included liquidation fees. Relevant OKX rules trigger liquidation at a ratio of 100% or below; handling can involve staged reductions. See liquidation.
The threshold must be understood with account mode and formula, not transferred by name to another indicator. Even percentage displays cannot be directly compared when covered assets, fees and requirements differ.
Why can the ratio change without any action?
Both equity and maintenance requirements can change.
- Prices and unrealized results: risk-valued results change equity. Mark prices are common calculated references.
- Fees and collateral: paid fees, funding receipts or payments, and collateral asset price changes can alter eligible equity.
- Position value and tiers: even fixed contract quantity can change in value and maintenance margin as prices move; adding or reducing positions also affects the ratio.
- Shared collateral scope: other cross-margin positions’ results or liabilities can change the same ratio without trading the current position.
Isolated margin usually calculates a separately collateralized position or risk unit; cross margin calculates within the product’s sharing scope. Cross margin does not automatically mean every user account and asset enters one ratio.
How does it differ from leverage and estimated liquidation price?
A margin ratio compares collateral equity and maintenance requirements; effective leverage compares position value and equity; estimated liquidation price translates current conditions into a possible trigger price. They relate but answer different questions.
For example, 400% in the teaching formula means equity is four times maintenance, not that price can fall 400%. Price changes affect results, position values and collateral; the ratio is not a direct price distance.
See leverage for selected leverage and opening requirements, and estimated liquidation price for deriving a price threshold from equity and requirements.
Related terms
Explore maintenance margin, margin and liquidation, or return to the crypto glossary.
References
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