What Mark to Market Settlement Actually Involves

Mark to market (MTM) settlement recalculates the value of every open futures position at the end of each trading session based on that day’s official settlement price, crediting the trading account with any gains and debiting it for any losses accrued during that session, rather than allowing gains and losses to simply accumulate on paper until the position is eventually closed.

Why Futures Use Daily Settlement Rather Than Settlement at Close

This daily settlement mechanism exists specifically to manage counterparty and credit risk across the exchange’s clearing system, ensuring that losses do not accumulate unrealised and unfunded over an extended period, which could otherwise create the kind of concentrated, systemic settlement risk that daily MTM is specifically designed to prevent.

How MTM Affects a Trader’s Cash Flow

Because gains and losses are settled daily rather than only upon closing a position, a futures trader’s account balance fluctuates with the market on a genuinely daily basis, meaning traders need to maintain sufficient funds in their account not just for initial margin but to absorb potential daily MTM losses without triggering a margin call, discussed in the dedicated margin calls guide.

The Settlement Price Used for Daily MTM Calculations

The specific settlement price used for daily MTM calculations is typically derived from the contract’s closing trading activity through a defined methodology published by the exchange, and understanding this specific calculation method helps traders anticipate exactly how their position’s daily settlement will be determined, particularly during volatile closing sessions.

MTM Gains and Losses Are Not the Same as Realised Profit

It is worth distinguishing daily MTM gains and losses, which are settled in cash each day but do not represent a final, closed-out trading outcome, from the eventual, genuinely realised profit or loss when a position is actually closed, since a position can show a series of daily MTM losses followed by an eventual gain when finally closed, or vice versa.

How MTM Interacts With Margin Requirements

Daily MTM losses directly reduce the margin available in a trading account, and if accumulated losses bring available margin below the required maintenance level, this can trigger the margin call process discussed in a dedicated guide, making daily MTM settlement a direct, mechanical driver of margin call risk for futures traders.

Tax Treatment Considerations Around MTM Settlement

For tax purposes, as discussed in the dedicated turnover calculation guide, the relevant profit or loss figure is generally based on the actual closed-out trade result over the position’s full holding period, not the daily MTM cash flows themselves, meaning traders should understand that daily MTM settlement and eventual tax-relevant profit calculation are related but distinct concepts.

Why Understanding MTM Matters for Position Sizing

Since daily MTM settlement means a futures position’s cash flow impact materialises continuously rather than only at closure, position sizing decisions should account for the realistic possibility of sustained daily MTM losses during an adverse move, ensuring sufficient account buffer exists to weather several consecutive unfavourable settlement days without a forced margin call.

MTM Across Multi-Day Holding Periods

For positional futures traders holding contracts over multiple days or weeks, tracking the cumulative daily MTM settlement alongside the position’s overall unrealised profit or loss provides a useful, ongoing check on how the position is actually performing day by day, rather than only assessing performance at the eventual point of closure.

Reviewing Daily MTM Statements as a Routine Habit

Regularly reviewing the daily MTM settlement statements a broker provides, rather than only checking overall account balance periodically, helps traders maintain a clearer, more continuous sense of exactly how each open position is contributing to daily account fluctuations.

The Bottom Line

Mark to market settlement recalculates and settles futures position gains and losses on a genuinely daily basis, creating a direct, ongoing cash flow impact distinct from the eventual realised profit or loss at position closure. Understanding this daily settlement mechanism, and maintaining sufficient account buffer to absorb potential daily losses, is essential for managing both margin requirements and overall risk in futures trading.