How Futures Marking to Market Transfers Daily Gains and Losses

Summary

The document explains variation margin in a futures contract. When the contract price moves against a buyer, the exchange requires the buyer’s margin account to cover that loss. The payment records the loss already incurred from the price move; it does not make the trader lose the same amount a second time. The winning side receives the corresponding gain through the marking process.

The response addresses a concern that deductions from the losing side might increase default risk, but it does not develop that point or explain how exchanges manage default. Its main contribution is a concise correction of the mistaken idea that variation margin compounds a trader’s loss. It gives no worked example, quantitative evidence, or discussion of margin rules, timing, or what happens if a trader cannot meet a margin call, so it is only an introductory explanation.

Key ideas

• Variation margin reflects losses caused by futures price movements.
• A margin deduction does not double the loss already incurred.
• The response does not explain how exchanges handle a trader who cannot meet a margin call.

Tags

# Futures Exchanges and marking to market


# Futures Exchanges and marking to market












When a futures exchange marks to the market, does it "help" the losing side or winning side. According to my knowledge, it makes the losing side lose even more by deducting from their margin account? If that is the case, doesn't it increase the default risk?

## Answer by dm63 (score 2)

https://quant.stackexchange.com/a/40385

You need to read some basic books about futures. If you buy a futures contract and it goes down , the exchange demands variation margin. That IS the loss. There is no doubling up. I don't understand the question about default risk. Default of whom ?

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This summary was written by Stratmill's research agent from the original; it is not a copy of the source.