# Borsa Istanbul - Equities Enumerations

Borsa Istanbul is Turkey’s sole stock exchange offering trading in Turkish equities, debt securities and derivatives.

The following fields have Enumerations:

* AGGRESSOR_SIDE - Indicates whether a trade resulted from an incoming buy or sell order.
* BOOK_TYPE - Type of order book or trading mechanism through which a trade was executed.
* CALL_PUT_IND - “C” - Call option, “P” - Put option
* MKT_PHASE - Indicates the instrument’s current market phase, as specified by the trading venue
* TRADE_PERIOD - Market period during which a trade was executed.
* TRADE_TYPE - Type of trade

#### AGGRESSOR_SIDE - Enumeration

| Enumeration ID   | Enumeration Description                          |
|------------------|--------------------------------------------------|
| ‘””’             | Undefined (e.g. auction trades, off-book trades) |
| B                | Buy                                              |
| S                | Sell                                             |

#### BOOK_TYPE - Enumeration

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

#### CALL_PUT_IND - Enumeration

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

#### MKT_PHASE - Enumeration

|   Enumeration ID | Enumeration Description                        |
|------------------|------------------------------------------------|
|                1 | Closed                                         |
|               10 | Suspended                                      |
|               11 | Trading at last price (Odd lot market)         |
|               12 | Continuous trading (Odd lot market)            |
|               13 | Volatility auction                             |
|               14 | One-sided buyback auction (hidden) uncrossing  |
|               15 | One-sided buyback auction (open) uncrossing    |
|               16 | One-sided issuing auction (hidden) uncrossing  |
|               17 | One-sided issuing auction (open) uncrossing    |
|               18 | After one-sided auction                        |
|                2 | Continuous trading                             |
|               20 | Single price auction uncrossing                |
|               21 | One-sided auction                              |
|               22 | Issuing auction (open) uncrossing              |
|               23 | Issuing auction (hidden) uncrossing            |
|               24 | Buyback auction (open) uncrossing              |
|               25 | Buyback auction (hidden) uncrossing            |
|               26 | Non-tradable                                   |
|               27 | Dissemination of price limits                  |
|                3 | Uncrossing                                     |
|                4 | Opening auction                                |
|                5 | Closing auction                                |
|               51 | Opening auction                                |
|               52 | One-sided auction                              |
|               53 | Volatility auction                             |
|               54 | Closing auction                                |
|               55 | Single price auction                           |
|               56 | Break after hours                              |
|               57 | Suspended after hours                          |
|               58 | Order cancellation                             |
|               59 | Circuit breaker auction                        |
|                6 | Break                                          |
|               60 | Circuit breaker auction                        |
|               61 | Market-wide circuit breaker auction uncrossing |
|               62 | Market-wide circuit breaker halt               |
|               63 | Market maker quoting period                    |
|                7 | Trading at last price                          |
|                8 | Intraday auction                               |
|                9 | Continuous trading (Primary market)            |
|               99 | Reset                                          |

#### TRADE_PERIOD - Enumeration

| Enumeration ID   | Enumeration Description           |
|------------------|-----------------------------------|
| -                | Regular trading                   |
| A                | Auction                           |
| C                | Closing auction                   |
| I                | Intraday auction                  |
| O                | Opening auction                   |
| P                | Public offering / buyback auction |
| T                | Trading at closing price          |
| U                | Unscheduled auction               |

#### TRADE_TYPE - Enumeration

| Enumeration ID   | Enumeration Description                    |
|------------------|--------------------------------------------|
| ‘””’             | Regular trade                              |
| BBO10            | Trade report at best bid/offer +/-10 ticks |
| LTP              | Trade report at last trade price           |
| LTP10            | Trade report at last trade price +/-10%    |
| LTP3             | Trade report at last trade price +/-3%     |
| LTP6             | Trade report at last trade price +/-6%     |
| WT               | Wholesale trade report                     |
| WTN              | Wholesale trade not settled by Takasbank   |