Mark-to-Market: Losers Pay Winners Daily
Every day the exchange settles all positions in cash — variation margin flows from losers to winners.
If you understood mark-to-market yesterday, you'd have seen the exact day this simulated crude position triggered a margin call. Most beginners only learn it when the cash is already gone. Let's make sure that's not you.
💡 Think of it like: Like a group bet settled at the end of every single day instead of at the end of the season — you can't hide a losing streak.
The rule that keeps the whole market alive
In stocks, a loss is just a sad number on screen until you sell. You can stare at it for years.
Futures don’t allow that. Every single day, at the close, the exchange runs mark-to-market (MTM): it sets one official settlement price and revalues every open position against it.
Then real cash moves. Winners get credited. Losers get debited. That daily cash transfer is called variation margin — and the one-line summary of the entire futures market is:
The losers pay the winners, every single day.
Walk through a real margin call
You buy 1 crude oil (/CL) contract = 1,000 barrels. Initial margin $10,000, maintenance margin $7,000.
| Day | Settlement | Move/barrel | Variation margin | Account equity |
|---|---|---|---|---|
| 0 | $60.00 (entry) | — | $0 | $10,000 |
| 1 | $57.60 | −$2.40 | −$2,400 | $7,600 |
| 2 | $56.60 | −$1.00 | −$1,000 | $6,600 ⚠️ |
On Day 2, equity ($6,600) drops below the $7,000 maintenance line. 🚨 Margin call.
The lesson everyone gets wrong
A margin call does not ask you to top back up to maintenance ($7,000). It demands you restore the account to the full initial margin — back to $10,000.
So you owe $3,400, not $400. Fail to pay promptly and the broker liquidates your position at market — mercilessly — to stop your account going negative (a negative balance you’d be legally liable for).
Variable reward: 🛡️ Discipline badge earned. You just internalized the single most catastrophic surprise in retail futures — before it cost you a cent.
You hold 1 crude oil contract (1,000 barrels). Initial margin $10,000, maintenance margin $7,000. Oil drops $2.40 then $1.00 over two days. Your equity is now $6,600. What happens?
🛡️ Risk-Management Focus
Mark-to-market means losses are real cash, debited daily — there's no 'unrealized loss' to wait out. A margin call demands a top-up to full initial margin or the broker liquidates you. Never trade size that puts a normal daily move near your maintenance level.