Mark-to-market (MTM) is a fundamental accounting practice used to price futures contracts at the end of each trading day. This process ensures that the value of the futures contracts reflects their current market value, providing a transparent and accurate representation of an investor’s financial position. MTM provides a clear and immediate reflection of an investor’s financial position, reducing the risk of hidden losses.
At the end of each trading day, the exchange determines the settlement price of each futures contract. This price is based on the last trade or a calculated average of trades during the settlement period.
The difference between the previous day’s settlement price and the current day’s settlement price is calculated. This difference is then credited or debited to the trader’s account, reflecting the day’s profit or loss.
Futures trading requires maintaining a margin account, which acts as collateral to cover potential losses. The MTM process directly impacts the cash balance in this account. If the account balance falls below the maintenance margin requirement due to daily losses, the trader must deposit additional funds (a margin call) to continue holding the position.
By adjusting the account balance daily, MTM helps manage the risk of default. Traders are required to maintain sufficient margin, ensuring they can cover potential losses. Regulatory bodies like the CFTC in the U.S. mandate MTM for futures contracts to protect market integrity and investor interests. The Financial Accounting Standards Board (FASB) outlines the principles of fair value accounting, which includes MTM, in its standards. Fair Value Measurements (Topic 820) (“ASC 820-10”) defines fair value, establishes a framework for measuring fair value under generally accepted accounting principles and expands disclosures about fair value measurements.
Examples Imagine you hold an August 2023 Crude Oil futures contract (/CLQ23) from the previous day’s close. The contract price drops by $1.20 to $71.44. If you are long on the contract (betting the price will rise) and the price fell, you incur a mark-to-market loss of $1,200. This is because each futures contract represents 1,000 barrels of crude oil, and the price change per barrel is multiplied by 1,000. Conversely, if you were short (betting the price will fall), your account would be debited $1,200.
Now, consider you buy a June 2023 E-mini S&P 500 Index futures contract (/ESM23) at a price of 3,900 on March 13, 2023. The official settlement price for /ESM23 on that date is 3,888.75. Being long at 3,900 means you’ve realized a mark-to-market loss of $562.50, as each point in /ES is worth $50. Your account is debited $562.50.
If you hold this position through the close of trading, you’ll experience daily mark-to-market gains or losses based on the difference between the previous day’s settlement and the current day’s settlement. For example:
This mark-to-market process continues until you close the position. Once closed, you sum all mark-to-market adjustments and any cash debits or credits from closing the position to calculate your overall profit or loss, excluding transaction costs.
This method ensures that your account reflects the current market value of your futures positions daily.
Mark-to-market is a critical process in futures trading, ensuring that the value of open positions reflects current market conditions. By adjusting account balances daily, MTM helps manage risk, maintain transparency, and comply with regulatory standards. Understanding and effectively managing MTM adjustments can significantly impact your trading strategy and financial health.