> Full docs in one file: https://kacdata.com/llms-full.txt

# Ticker

Source: https://kacdata.com/docs/schemas/ticker

> Schema for Kalshi ticker updates.

Each row is a message from the Kalshi `ticker` channel, sent when any of its fields changes. One file per market per UTC day.

**Data type:** `ticker` ·

## Schema

| Field | Type | Description |
| --- | --- | --- |
| `market_ticker` | `string` | Kalshi market ticker. |
| `timestamp` | `timestamp[us]` | Kalshi timestamp (`ts_ms`). |
| `local_timestamp` | `timestamp[us]` | KacData receive timestamp. |
| `event_type` | `string` | `ticker`. |
| `price` | `decimal(18,4)` | Last traded price. |
| `yes_bid` | `decimal(18,4)` | Best YES bid. |
| `yes_bid_size` | `decimal(18,4)` | Contracts at the best YES bid. |
| `yes_ask` | `decimal(18,4)` | Best YES ask. |
| `yes_ask_size` | `decimal(18,4)` | Contracts at the best YES ask. |
| `last_trade_size` | `decimal(18,4)` | Contracts in the last trade. |
| `volume` | `decimal(18,4)` | Cumulative contracts traded. |
| `open_interest` | `decimal(18,4)` | Open interest, in contracts. |
| `dollar_volume` | `int64` | Cumulative traded value, in whole dollars. |
| `dollar_open_interest` | `int64` | Open interest value, in whole dollars. |

When one side of the book is empty, Kalshi sends placeholder values (bid `0.0000`, ask `1.0000`); they are kept as received.