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Help Center Trading Futures/Futures Options How do we value your options positions?

How do we value your options positions?

The value and profit or loss (P/L) of your options positions are all calculated based on the mark price. The mark price is a reference price used to determine the fair value of an option.
There are two ways to find the mark price of an option:
  1. Go to the option's quotes page.
  2. Check the options chain.
Mark price calculation by options type:
Options Type Mark Price Calculation
US stock options and index options Mark Price = (Best Bid + Best Ask) / 2
Hong Kong stock options and index options Mark Price = Last Price, unless:
• If Best Ask < Last Price, then Mark Price = Best Ask
• If Best Bid > Last Price, then Mark Price = Best Bid
Futures options
US options are now connected to OCC (Options Clearing Corporation) settlement prices. After the US market closes (generally at 8:00 PM ET on trading days), we will update the market value of your US options positions using the official OCC settlement price.

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