All option contracts on the same underlying and of the same type (call or put).
For example, AAPL calls (all expirations and strikes) are an option class, AAPL puts are another option class, and IBM calls are yet another option class.
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All option contracts on the same underlying and of the same type (call or put).
For example, AAPL calls (all expirations and strikes) are an option class, AAPL puts are another option class, and IBM calls are yet another option class.