Short answer: mark to market means valuing an asset or an open position at its current market price instead of the price you paid. Accountants use it for financial reporting so a balance sheet reflects what holdings are worth now. Traders meet it every second, because a trading platform marks every open position to the latest quote and shows the result as equity. That live number, not your entry price, is what margin checks and drawdown rules are judged against.
Written for CFD traders in forex, indices, metals and crypto who meet the phrase in the news and on their own platform. You will leave knowing how the mechanics work, where the method is brittle, and how it decides whether an evaluation attempt survives a rough session.
How mark to market works, step by step
The mechanics are plainly simple. Take the quantity held, multiply it by the current price, and compare that value with the last recorded value. The difference is an unrealised gain or loss and it is booked immediately, even though nothing has been sold.
A worked example with round numbers. You hold a 10,000 account and buy a gold CFD position worth 10 per point at 2,000. Gold closes the session at 1,950, which is 50 points lower. The platform marks the position at the new price: a 500 floating loss. Your balance still reads 10,000, but your marked equity reads 9,500. The next session gold recovers to 2,020. The mark now shows a 200 gain, equity is 10,200, and balance has not moved once. Our guide to balance versus equity in trading explains why only the second figure matters for risk.
Three details are easy to miss:
- Marking uses the exit side of the quote, so a long position is valued at the bid and a short at the ask.
- Spread and commission cost are deducted at the mark, which is why a fresh position opens slightly under water.
- Swap charges post to the same running total, so a position held for weeks accumulates a lumpy drag that the entry price never shows.
Mark to market versus historical cost
Historical cost records what you paid and leaves the figure alone until the asset is sold. Mark to market refreshes it constantly. Both are legitimate valuation methods, and the argument is about which one tells a more honest story.
| Question | Historical cost | Mark to market |
|---|---|---|
| What number is recorded | Original purchase price | Current market price |
| How often it changes | Only on sale or impairment | Every quote, or every reporting date |
| Behaviour in a crash | Stale but calm | Accurate but violently swinging |
| Who prefers it | Long-term holders, illiquid assets | Traders, dealers, regulators |
| Main weakness | Hides losses for years | Books losses that may never be realised |
For a trader the choice is made for you. No broker or prop firm values open positions at entry, so the only question is whether you read the marked number or the stale one.
Benefits and limitations of marking to market
The benefits are real. Marking keeps asset valuation current, so investor confidence rests on numbers that mean something. It stops a company from quietly carrying a threadbare portfolio at generous old prices, and a marked position has to match a price anyone can look up.
The limitations are just as consequential. In thin markets the "current price" is patchy or absent, and the mark becomes a guess dressed as a fact. During sharp market fluctuations the method turns a temporary dip into a booked loss, and that loss can trigger margin calls, forced selling and a further dip. For financial institutions this feedback loop is the central worry. A bank whose loan book is marked down loses regulatory capital, and liquidity dries up at the moment it is needed most. Critics say mark to market needlessly deepened the losses reported through 2008. Supporters answer bluntly that the losses were there anyway and the accounting only refused to hide them.
Accounting standards: FASB, IFRS and GAAP
In the United States the Financial Accounting Standards Board (FASB) sets the rules. U.S. Generally Accepted Accounting Principles (GAAP) then describe fair value in a three-level hierarchy. Level 1 uses quoted prices in active markets. Level 2 uses observable inputs such as prices of similar assets. Level 3 uses a model when no observable price exists. International Financial Reporting Standards (IFRS) use a similar structure, so global banks report on comparable terms.
The standards have shifted more than once. After the 2008 crisis the FASB relaxed guidance on how to mark assets in disorderly markets, allowing more judgement when trades were scarce. That easing was welcomed by banks and grudgingly accepted by critics who saw it as a step back toward stale numbers. Your platform sits firmly at Level 1: the mark is the live quote, full stop. For plain definitions of margin, settlement and related terms, the CFTC glossary of trading terms is a sober reference.
Case studies: when marking to market helped and when it hurt
The overstated energy book. An energy trading company in the early 2000s marked long-dated contracts to its own models rather than to observable prices. Level 3 estimates booked years of expected profit up front. When the assumptions failed, the marked gains vanished and the firm collapsed. The lesson is that mark to market is only as honest as the price feeding it.
The bank in a frozen market. During 2008 many banks held mortgage securities with almost no buyers. Marked at the few distressed trades available, the write-downs were huge, and some of the loss was later reversed when prices recovered. The method was accurate about the moment and wrong about the outcome, which is an awkward pair.
The retail trader with a stubborn bias. A trader stubbornly holds a losing index CFD for three weeks, insisting the entry was right. The platform marks the position lower every day, equity falls, and the daily loss limit is breached on one afternoon spike. Nothing was sold and nothing was "really" lost, yet the attempt is over. This is the case that matters most to readers here.
Mark to market and prop-firm drawdown limits
Every evaluation rule that can end an attempt is measured on the marked value of your account, never on closed trades alone. That makes the daily loss limit and total drawdown effectively mark to market rules. A 10,000 account with a 500 daily limit is breached when marked equity touches 9,500, whether or not you closed anything. Our guide on how to trade within drawdown limits builds a routine around that fact.
Pivex uses a static total drawdown, so the floor does not chase your equity higher, and the daily loss limit resets each day. There is no time limit and no minimum number of trading days, which removes the hesitancy that pushes people into lopsided, oversized trades. The built-in assistant tracks your live marked equity against those limits, so the arithmetic is done for you during a jittery news release.
Where mark to market bites hardest is on positions held overnight. A wobbly weekend gap on an index CFD is marked the instant the market opens. If that mark lands below the floor, the rule triggers before you can react. That is also the mechanism behind the margin call described in our explainer on what a margin call is.
A checklist for reading your own mark to market
For most traders the marked number is underused and the entry price is overused. A short routine is a good fix.
- Before every trade, write down the current marked equity, not the balance.
- Convert your daily loss limit into a marked equity floor for that day and note it beside the trade.
- Size the position so a full stop loss uses at most half the distance to that floor.
- Check what the mark will look like after spread, commission and one night of swap.
- Treat an unrealised gain as fickle until it is closed, and refuse to add size on the strength of it.
- When the market turns disorderly, halve the usual size until the swings decelerate.
Results vary, but in my experience traders who do this seldom get surprised by a limit breach. The tedious part is the writing down. The thankless part is admitting that the mark, not the entry, is the truth.
Next step: open your platform, find the marked equity figure, and set a hard floor for it before the next session rather than after a breach. If you plan to attempt a one-step evaluation, Pivex states its daily and total limits before you start and the fee is refundable. The only cost of taking the mark seriously is a little discipline.
Related guides: balance versus equity in trading and how to trade within drawdown limits.
Before participating, review Pivex's current program rules and decide whether a simulated proprietary trading evaluation fits your experience and risk limits. Participation does not guarantee a reward, income, or any particular trading result.