# Osaka Exchange - Index + Equity Futures Enumerations

The Osaka Exchange offers trading in index and equity futures, including the Nikkei 225 futures and options.

The following fields have Enumerations:

* BOOK_TYPE - Type of order book or trading mechanism through which a trade was executed.
* TRADE_PERIOD - Market period during which a trade was executed.
* TRADE_TYPE - Type of trade

#### BOOK_TYPE - Enumeration

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

#### TRADE_PERIOD - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| -                | Regular trading           |
| A                | Auction                   |
| C                | Closing auction           |
| O                | Opening auction           |
| U                | Unscheduled auction       |

#### TRADE_TYPE - Enumeration

|   Enumeration ID | Enumeration Description           |
|------------------|-----------------------------------|
|                0 | Regular trade                     |
|               20 | Auction trade                     |
|                3 | J-Net trade                       |
|               36 | Tailor-Made Combination leg trade |
|               43 | Trade from implied order          |
|                5 | J-Net cross trade                 |
|                7 | Standard Combination leg trade    |