# Korea Exchange - ETFs and ETNs Enumerations

The Korea Exchange (KRX) offers trading in exchange-traded funds (ETFs) and exchange-traded notes (ETNs).

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 order book            |
|                1 | Off-book                  |
|                2 | Dark book                 |

#### CALL_PUT_IND - Enumeration

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

#### TRADE_PERIOD - Enumeration

| Enumeration ID   | Enumeration Description              |
|------------------|--------------------------------------|
| -                | Regular trading                      |
| C                | Closing auction                      |
| E                | Outside hours (Early session)        |
| L                | Outside hours (Late session)         |
| O                | Opening auction                      |
| T                | Trading at closing price             |
| U                | Unscheduled auction                  |
| c                | Post-close auction                   |
| u                | Unscheduled auction (extended hours) |

#### TRADE_TYPE - Enumeration

|   Enumeration ID | Enumeration Description                               |
|------------------|-------------------------------------------------------|
|                1 | Regular trade                                         |
|               10 | Pre-opening basket trade                              |
|               11 | K-Blox block trade                                    |
|               12 | Basket trade                                          |
|               13 | Single price post-market trade                        |
|               14 | Quote without trade (valuation price)                 |
|               15 | Pre-open A-Blox block trade                           |
|               16 | A-Blox block trade                                    |
|               17 | Buy-in trade                                          |
|               18 | Auction trade (volatility auction)                    |
|               19 | Auction trade (extended volatility auction)           |
|                2 | Pre-opening trade (at previous close)                 |
|               20 | Auction trade (off-hours volatility auction)          |
|               21 | Auction trade (extended off-hours volatility auction) |
|                3 | After-hours block trade                               |
|               32 | Block trade                                           |
|               33 | Block trade (pre-market)                              |
|               34 | Block trade (post-market)                             |
|                4 | After-hours trade at closing price                    |
|                5 | Pre-opening block trade                               |
|                6 | After-hours K-Blox block trade                        |
|                7 | After-hours basket trade                              |
|                8 | Single price auction trade                            |
|                9 | Pre-opening K-Blox block trade                        |