| Name | Type | Description |
|---|---|---|
| Last | decimal? | The price of the last trade |
| LastSize | int? | The size of the last trade |
| LastTimestamp | DateTime? | The time of the last trade |
| Volume | int? | The cumulative volume of this options contract that traded that day. |
| Ask | decimal? | The price of the top ask order |
| AskSize | int? | The size of the top ask order |
| AskTimestamp | DateTime? | The timestamp of the top ask order |
| Bid | decimal? | The price of the top bid order |
| BidSize | int? | The size of the top bid order |
| BidTimestamp | DateTime? | The time of the top bid order |
| OpenInterest | int? | The total number of this options contract that are still open. |
| ExerciseStyle | string | The exercise style of the option. ("A" = "American", "E" = "European") |