| Name | Type | Description | Notes |
|---|---|---|---|
| contract_type | string | The type of contract. Can be "put", "call", or in some rare cases, "other". | |
| exercise_style | string | The exercise style of this contract. See <a rel="nofollow" target="_blank" href="https://en.wikipedia.org/wiki/Option_style\">this link</a> for more details on exercise styles. | |
| expiration_date | \DateTime | The contract's expiration date in YYYY-MM-DD format. | |
| shares_per_contract | float | The number of shares per contract for this contract. | |
| strike_price | float | The strike price of the option contract. | |
| ticker | string | The ticker symbol for the asset. |