# Cboe Futures Exchange (CFE) Enumerations

The Cboe Futures Exchange (CFE) offers trading in volatility futures, including the Cboe Volatility Index (VIX) futures.

The following fields have Enumerations:

* BOOK_TYPE - Type of order book or trading mechanism through which a trade was executed.
* CALL_PUT_IND - “C” - Call option, “P” - Put option
* TRADE_PERIOD - Market period during which a trade was executed.
* TRADE_TYPE - Type of trade

#### BOOK_TYPE - Enumeration

|   Enumeration ID | Enumeration Description   |
|------------------|---------------------------|
|                0 | Lit book                  |
|                1 | Off-book                  |

#### CALL_PUT_IND - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| C                | Call option               |
| P                | Put option                |

#### TRADE_PERIOD - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| -                | Regular trading           |
| A                | Auction                   |
| O                | Opening auction           |

#### TRADE_TYPE - Enumeration

|   Enumeration ID | Enumeration Description                          |
|------------------|--------------------------------------------------|
|                0 | Regular trade                                    |
|               12 | Re-opening trade                                 |
|               14 | Spread trade                                     |
|               17 | Trade cancellation                               |
|               22 | Block trade                                      |
|               23 | Exchange of contract for related position (ECRP) |
|                4 | Late reported (in correct sequence)              |
|                5 | Opening trade                                    |