# Shanghai Stock Exchange - Equities Enumerations

The Shanghai Stock Exchange (SSE) offers trading in A-shares, B-shares, bonds, and other securities issued by Chinese companies.

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.
* 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, implied trades, off-book trades) |
| B                | Buy                                                              |
| S                | Sell                                                             |

#### BOOK_TYPE - Enumeration

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

#### MKT_PHASE - Enumeration

| Enumeration ID   | Enumeration Description                                       |
|------------------|---------------------------------------------------------------|
| 1                | Start of day                                                  |
| 10               | Period between end of auction and start of continuous trading |
| 2                | Auction                                                       |
| 3                | Continuous trading                                            |
| 4                | Break                                                         |
| 5                | End of trading                                                |
| 6                | Suspended                                                     |
| 8                | Circuit breaker                                               |
| 9                | Circuit breaker + close                                       |
| ADD              | Pre-listing                                                   |
| CCALL            | Closing auction                                               |
| CLOSE            | Closed                                                        |
| ENDTR            | End of trading day                                            |
| OCALL            | Opening auction                                               |
| START            | Resume                                                        |
| SUSP             | Suspended                                                     |
| TRADE            | Continuous trading                                            |

#### TRADE_PERIOD - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| -                | Regular trading           |
| C                | Closing auction           |
| O                | Opening auction           |

#### TRADE_TYPE - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| ‘””’             | Regular trade             |