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Option Chain

Trading Term

An option chain is a structured listing of all available option contracts for a specific underlying asset, typically organized by expiration date and strike price. It presents essential data such as the bid and ask prices, volume, open interest, implied volatility, and Greeks (like Delta and Theta) for each option. Market participants rely on the option chain as a central reference for evaluating and comparing call and put contracts under various conditions.

The option chain is divided into two sections: calls on one side and puts on the other. Within each section, options are arranged by strike price and often grouped by expiration. Investors use the option chain to gauge market sentiment, assess liquidity, and identify potential strategies such as covered calls, straddles, or vertical spreads. For example, high open interest at a particular strike may indicate a significant level of support or resistance for the underlying asset.

In practice, analyzing an option chain requires an understanding of how factors like time decay, volatility, and moneyness affect pricing. Advanced traders often use this data to anticipate price movements or to construct complex strategies involving multiple legs. Brokers and trading platforms often enhance option chains with filters, visualizations, and calculators to support real-time decision-making. The option chain is therefore both a diagnostic tool and a strategy planner for active traders and portfolio managers.

In Trader Workstation (TWS), use the OptionTrader to view option chains for a given underlying security.

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