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Start Learning → Browse All Articles →MTM meaning, in trading, refers to mark-to-market — the process of revaluing an open position at the end of every trading session based on that day’s closing price, rather than waiting until the position is eventually closed to recognise a gain or loss. This is the mechanism that turns an unrealised, on-paper move in a position into something that actually affects an account’s margin balance overnight. This piece works through how the daily revaluation actually happens, why it exists as a settlement practice, how it connects to margin calls, and the habits worth building around it for anyone holding leveraged positions. How Daily Revaluation Actually Works At the end of each trading session, every open leveraged position is revalued against that day’s official closing price, and the difference between this new value and the previous valuation is settled — credited or debited — to the account holding the position. This happens regardless of whether the position is closed; it is a daily settlement process applied to positions that remain open overnight. The next trading day then begins with the position effectively re-based at the prior day’s closing price for the purpose of this calculation. Any further gain or loss from that new base is settled again at the close of that next session, and the cycle repeats for as long as the position stays open. Over the life of a position, the sum of all these daily settlements adds up to the same total gain or loss that would result from a single calculation done only at the point of closing — mark-to-market simply spreads that recognition across each day rather than deferring it entirely. Why the Closing Price Specifically Is Used The official closing price is used because it is a standardised, exchange-determined reference point available for every listed instrument at the end of every session, making it a consistent and auditable basis for revaluing positions across the entire market at once. Using any other reference point would introduce inconsistency in how different positions or different accounts get revalued on the same day. Why This Practice Exists at All Mark-to-market exists primarily as a risk-management mechanism for the broader system, not merely as an accounting convenience for the individual trader. Leveraged positions carry risk that scales with how much the market moves against them, and if losses were only recognised when a position eventually closed, an account could accumulate a large unrealised loss for an extended period without that risk being reflected anywhere in its available margin. By forcing daily recognition of gains and losses, the mark-to-market process ensures that an account’s margin balance always reflects the current, real-time state of its open positions rather than a stale value from whenever the position was first taken. This protects the broader clearing system by making sure that losses are funded as they accrue, rather than being allowed to build up silently until a position is finally closed. The Direct Link to Margin Calls Because mark-to-market settlement actually debits an account for the day’s loss on an open position, a string of adverse daily settlements can steadily erode the margin available in that account. Once available margin falls below the minimum level required to keep the position open, the broker issues a margin call requesting additional funds be added to restore the required margin. What Happens If a Margin Call Is Not Met If the requested funds are not added within the timeframe set by the broker, the position can be closed out — partially or fully — without further instruction from the account holder, specifically to bring the account back within its required margin. This is not a penalty imposed arbitrarily; it follows directly from the mechanics described above, where daily settlement has reduced available margin to a level the broker’s own risk rules will not permit for a position of that size. The exact timeframe and process for this forced close-out varies by broker, which is worth confirming in advance rather than discovering during an actual margin call. Understanding this connection is what makes mark-to-market more than an abstract accounting detail — it is the mechanism that determines exactly when and why a margin call arrives, and recognising the pattern of consecutive adverse daily settlements building up is often the clearest early warning that a margin call may be approaching before it is actually issued. How Mark-to-Market Differs From a Realised Gain or Loss It helps to be precise about a distinction that often causes confusion: a mark-to-market adjustment reflects an unrealised change in the value of a position that remains open, while a realised gain or loss only occurs once a position is actually closed. The daily settlement amount is real in the sense that it genuinely moves cash in or out of margin, but it is not final in the sense of representing the ultimate outcome of the trade — a losing day can be followed by a recovering one, with the mark-to-market process capturing both movements as they happen. This is worth remembering specifically because the day-to-day mark-to-market figure can create a misleading emotional read on a position if treated as the final word rather than as a running, revisable calculation. A position sitting at a mark-to-market loss on a given evening has not necessarily produced a final loss — it reflects the position’s value at that one specific closing price, on that one specific day, nothing more and nothing less. The cumulative sum of every daily mark-to-market settlement over a position’s life will, by construction, always equal the realised gain or loss recognised when the position is finally closed. Nothing is lost or double-counted by spreading recognition across days — the running total simply becomes visible earlier, session by session, instead of arriving as a single number only at the end. Practical Habits Around Managing Daily Settlement A few habits make the mark-to-market process easier to manage rather than something that arrives as a surprise: Check margin utilisation regularly, not only after a margin
MTM meaning, in trading, refers to mark-to-market — the process of revaluing an open position at the end of every trading session based on that day’s closing price, rather than waiting until the position is eventually closed to recognise a gain or loss. This is the mechanism that turns an unrealised, on-paper move in a position into something that actually affects an account’s margin balance overnight. This piece works through how the daily revaluation actually happens, why it exists as a settlement practice, how it connects to margin calls, and the habits worth building around it for anyone holding leveraged positions.
At the end of each trading session, every open leveraged position is revalued against that day’s official closing price, and the difference between this new value and the previous valuation is settled — credited or debited — to the account holding the position. This happens regardless of whether the position is closed; it is a daily settlement process applied to positions that remain open overnight.
The next trading day then begins with the position effectively re-based at the prior day’s closing price for the purpose of this calculation. Any further gain or loss from that new base is settled again at the close of that next session, and the cycle repeats for as long as the position stays open. Over the life of a position, the sum of all these daily settlements adds up to the same total gain or loss that would result from a single calculation done only at the point of closing — mark-to-market simply spreads that recognition across each day rather than deferring it entirely.
The official closing price is used because it is a standardised, exchange-determined reference point available for every listed instrument at the end of every session, making it a consistent and auditable basis for revaluing positions across the entire market at once. Using any other reference point would introduce inconsistency in how different positions or different accounts get revalued on the same day.
Mark-to-market exists primarily as a risk-management mechanism for the broader system, not merely as an accounting convenience for the individual trader. Leveraged positions carry risk that scales with how much the market moves against them, and if losses were only recognised when a position eventually closed, an account could accumulate a large unrealised loss for an extended period without that risk being reflected anywhere in its available margin.
By forcing daily recognition of gains and losses, the mark-to-market process ensures that an account’s margin balance always reflects the current, real-time state of its open positions rather than a stale value from whenever the position was first taken. This protects the broader clearing system by making sure that losses are funded as they accrue, rather than being allowed to build up silently until a position is finally closed.
Because mark-to-market settlement actually debits an account for the day’s loss on an open position, a string of adverse daily settlements can steadily erode the margin available in that account. Once available margin falls below the minimum level required to keep the position open, the broker issues a margin call requesting additional funds be added to restore the required margin.
If the requested funds are not added within the timeframe set by the broker, the position can be closed out — partially or fully — without further instruction from the account holder, specifically to bring the account back within its required margin. This is not a penalty imposed arbitrarily; it follows directly from the mechanics described above, where daily settlement has reduced available margin to a level the broker’s own risk rules will not permit for a position of that size. The exact timeframe and process for this forced close-out varies by broker, which is worth confirming in advance rather than discovering during an actual margin call.
Understanding this connection is what makes mark-to-market more than an abstract accounting detail — it is the mechanism that determines exactly when and why a margin call arrives, and recognising the pattern of consecutive adverse daily settlements building up is often the clearest early warning that a margin call may be approaching before it is actually issued.
It helps to be precise about a distinction that often causes confusion: a mark-to-market adjustment reflects an unrealised change in the value of a position that remains open, while a realised gain or loss only occurs once a position is actually closed. The daily settlement amount is real in the sense that it genuinely moves cash in or out of margin, but it is not final in the sense of representing the ultimate outcome of the trade — a losing day can be followed by a recovering one, with the mark-to-market process capturing both movements as they happen.
This is worth remembering specifically because the day-to-day mark-to-market figure can create a misleading emotional read on a position if treated as the final word rather than as a running, revisable calculation. A position sitting at a mark-to-market loss on a given evening has not necessarily produced a final loss — it reflects the position’s value at that one specific closing price, on that one specific day, nothing more and nothing less.
The cumulative sum of every daily mark-to-market settlement over a position’s life will, by construction, always equal the realised gain or loss recognised when the position is finally closed. Nothing is lost or double-counted by spreading recognition across days — the running total simply becomes visible earlier, session by session, instead of arriving as a single number only at the end.
A few habits make the mark-to-market process easier to manage rather than something that arrives as a surprise:
None of these habits change how the mechanism itself works, but they change how much control an account holder retains over decisions that would otherwise be forced by an unexpected margin call arriving at an inconvenient moment. The account holders who are least often caught off guard by a margin call tend to be the ones who already know, before it happens, roughly how many adverse sessions their current margin buffer can absorb — a figure that is straightforward to estimate once position size and available margin are both known.
Mark-to-market settlement applies specifically to leveraged, exchange-traded positions held in segments where daily settlement is part of the standard clearing process. It is not a concept that applies to a straightforward delivery-based purchase of shares held without leverage, since there is no daily settlement cycle attached to a simple cash purchase held in a demat account.
This distinction is worth keeping clear because the practical implications are quite different. A delivery-based holding can sit through a period of paper losses without any margin call being possible, since there is no leveraged position and no daily settlement mechanism attached to it. A leveraged position in the same underlying instrument, by contrast, is subject to the full daily revaluation and margin-call process described throughout this piece.
It can seem counterintuitive that holding shares of the same company can carry entirely different risk profiles depending on how the position is structured, but the difference comes down entirely to leverage and the daily settlement obligation that comes with it. A delivery-based holder has already paid the full value of the position and owns the shares outright, so a decline in price is simply a decline in the value of an asset already fully owned — uncomfortable, perhaps, but not something that can trigger a forced close-out through a margin mechanism. A leveraged position holder has only committed a fraction of the position’s value as margin, with the daily settlement process actively drawing down that margin as the position moves unfavourably, which is what creates the possibility of a forced close-out that simply does not exist for the delivery-based holder.
The margin required to open and hold a leveraged position is calculated separately from the mark-to-market process, using a risk-based methodology that estimates how much a position could plausibly lose over a short holding period under normal market conditions. This upfront margin requirement is what determines how large a position an account can take in the first place.
Mark-to-market then operates on top of that initial margin requirement, adjusting the account’s margin balance daily as the position’s value changes. The two concepts work together: the upfront margin sets the required cushion, and daily mark-to-market settlement is what actually draws down or replenishes that cushion as the position moves. A position can be adequately margined at the moment it is opened and still generate a margin call days later purely through the accumulated effect of daily mark-to-market settlements moving against it, which is why the two ideas are best understood as connected rather than treating either one in isolation.
MTM stands for mark-to-market — the daily process of revaluing an open leveraged position against that session’s closing price and settling the resulting gain or loss to the account, rather than waiting until the position is eventually closed.
No. A mark-to-market loss reflects the position’s value at one specific closing price on one specific day. It is an unrealised, revisable figure, not a final outcome — the position can recover or decline further on subsequent days until it is actually closed.
Daily mark-to-market settlement can steadily reduce an account’s available margin when a position moves against it repeatedly. Once available margin falls below the required minimum, the broker issues a margin call, and failing to meet it can result in the position being closed out.
No. Mark-to-market settlement applies to leveraged, exchange-traded positions subject to daily clearing cycles. A straightforward delivery-based purchase held without leverage has no daily settlement mechanism and no associated margin call risk from mark-to-market.
It happens at the end of every trading session for any open leveraged position, using that session’s official closing price as the revaluation reference point. This is a fixed part of the daily settlement cycle, not something that varies by broker or by the size of a particular position.