Variation Margin
Variation margin is the daily (or intraday) cash flow transferred between counterparties in a futures, centrally cleared swap, or collateralized OTC derivatives contract to reflect the day's profit or loss from mark-to-market changes in the position's value. Unlike initial margin, which is a performance bond held against future potential losses, variation margin represents the daily settlement of realized gains and losses to maintain economic parity between counterparties.
Key takeaways
- Variation margin is the daily P&L settlement payment: the party whose position lost value pays the party whose position gained value.
- In exchange-traded futures, variation margin flows are processed through the clearinghouse at end of day (and sometimes intraday during extreme volatility).
- Variation margin must be posted in cash (or cash-equivalents), whereas initial margin may often be posted as high-quality securities.
- Post-Dodd-Frank, variation margin requirements were extended to bilateral OTC derivatives, closing a major pre-crisis gap in collateralization practice.
- Failure to meet a variation margin call results in position liquidation by the broker or clearinghouse, underscoring liquidity risk for leveraged derivatives users.
Explanation
Variation margin is the mechanism by which futures markets and centrally cleared derivatives markets eliminate credit risk on a daily basis. Each trading day, the clearinghouse marks all open positions to the daily settlement price. Positions that have gained in value receive a cash inflow (variation margin received); positions that have lost value owe a cash outflow (variation margin paid). By the end of each trading day, all unrealized gains and losses since inception have been converted into realized cash flows, ensuring that no counterparty accumulates a large uncollateralized exposure to another party. This daily settlement process is the foundational mechanism that has made exchange-traded futures one of the most credit-safe derivative markets in the world.
The distinction between variation margin and initial margin is conceptual but crucial. Initial margin (also called performance bond or deposit margin) is posted upfront by both parties to cover potential future losses over the close-out period — typically one to three days — in the event of counterparty default. It is a buffer against the risk that the defaulting party's position loses value before it can be liquidated. Variation margin, by contrast, has nothing to do with future potential losses; it is the settlement of current realized profits and losses. In practice, variation margin flows are typically much larger than initial margin requirements over the life of a position in a trending market.
For OTC derivatives, variation margin requirements were historically applied inconsistently before the 2008 financial crisis, contributing to the accumulation of enormous uncollateralized exposures between major dealers and their counterparties (AIG's derivatives book being the most cited example). Post-crisis regulatory reforms under Dodd-Frank and EMIR in Europe mandated that bilateral OTC derivatives covered by the rules must be subject to daily variation margin, with strict rules on eligible collateral (primarily cash and high-quality government bonds). These rules significantly reduced systemic credit exposure in the OTC derivatives market.
Variation margin creates an important dimension of liquidity risk for derivatives users. A portfolio of futures contracts in a trending market generates daily variation margin outflows that must be funded in cash. Even if the position is ultimately profitable, a sufficiently long adverse trend can deplete a fund's liquidity reserves before the position reverses. This 'gap' between the ability to hold a position and the ability to fund daily margin calls is called liquidity risk, and it was a factor in the forced unwind of many leveraged funds during the 2008 crisis and the 2022 UK gilt crisis that threatened pension funds with liability-driven investment strategies. Sophisticated funds model their expected variation margin cash flows under stress scenarios to ensure they maintain sufficient liquid reserves.
For centrally cleared interest rate swaps, which replaced much bilateral OTC market activity after Dodd-Frank, variation margin is computed and called multiple times per day during periods of high volatility, further compressing the window in which a counterparty default could generate uncovered losses. Central counterparty clearinghouses (CCPs) apply tiered models — initial margin provides the first line of defense, followed by variation margin settlement, default fund contributions, and finally CCP equity — creating a robust 'waterfall' of loss-absorbing resources.
Formula
Variation Margin = (Settlement Price Today - Settlement Price Yesterday) × Contract Size × Number of Contracts
Example
A commodity trading firm buys 50 crude oil futures contracts (each covering 1,000 barrels) at $80.00 per barrel on Day 1, posting initial margin of $100,000. On Day 2, the settlement price falls to $78.50 per barrel. The loss per contract is $1.50 × 1,000 = $1,500. For 50 contracts, the variation margin call is $1,500 × 50 = $75,000, which must be paid to the clearinghouse by a specified time the following morning (often 9 a.m.). On Day 3, the settlement price rises to $81.00, and the firm receives variation margin of ($81.00 - $78.50) × 1,000 × 50 = $125,000. Over the two days, the net variation margin received is $125,000 - $75,000 = $50,000, reflecting the net gain on the position. If the firm had been unable to fund the $75,000 margin call on Day 2, the clearinghouse would have liquidated the position at the prevailing market price.
Related terms
Basis Bond Central Counterparty Cover Credit Risk Default Delta Emir Equity Exchange Final Settlement Price Financial Crisis