> ## Documentation Index > Fetch the complete documentation index at: https://docs.kalshi.com/llms.txt > Use this file to discover all available pages before exploring further. # Market Ticker > Margin market updates are delivered on a single channel. `ticker` messages include price, top-of-book size, volume, open-interest, and optional reference/mark prices. Messages are coalesced to at most one per market per second (latest value wins within the window). Requirements: - no additional channel-level auth beyond the authenticated WebSocket connection - market specification optional - supports `market_ticker`/`market_tickers` ## AsyncAPI ````yaml perps_asyncapi.yaml ticker id: ticker title: Market Ticker description: > Margin market updates are delivered on a single channel. `ticker` messages include price, top-of-book size, volume, open-interest, and optional reference/mark prices. Messages are coalesced to at most one per market per second (latest value wins within the window). Requirements: - no additional channel-level auth beyond the authenticated WebSocket connection - market specification optional - supports `market_ticker`/`market_tickers` servers: - id: production protocol: wss host: external-api-margin-ws.kalshi.com bindings: [] variables: [] - id: demo protocol: wss host: external-api-margin-ws.demo.kalshi.co bindings: [] variables: [] address: ticker parameters: [] bindings: [] operations: - &ref_1 id: receiveTicker title: Ticker Update type: send messages: - &ref_2 id: ticker contentType: application/json payload: - name: Ticker Update description: Margin market ticker information type: object properties: - name: type type: string description: ticker required: true - name: sid type: integer description: Server-generated subscription identifier required: true - name: msg type: object required: true properties: - name: market_ticker type: string description: Unique market identifier required: true - name: price type: string description: >- Last traded price in USD as a fixed-point decimal string (4 decimals). required: true - name: bid type: string description: USD price as a fixed-point decimal string (4 decimals). required: true - name: ask type: string description: USD price as a fixed-point decimal string (4 decimals). required: true - name: bid_size_fp type: string required: true - name: ask_size_fp type: string required: true - name: last_trade_size_fp type: string required: true - name: volume type: string description: One sided total trade volume in contracts. required: true - name: volume_notional_value_dollars type: string description: Total notional value of one sided trade volume in dollars. required: true - name: volume_24h type: string description: One sided trade volume in the last 24 hours in contracts. required: true - name: volume_24h_notional_value_dollars type: string description: >- Total notional value of one sided trade volume in the last 24 hours in dollars. required: true - name: open_interest type: string description: One sided open interest in contracts. required: true - name: open_interest_notional_value_dollars type: string description: >- Total notional value of one sided open interest in dollars. required: true - name: reference_price type: object description: Reference price of underlying asset, when available. required: false properties: - name: price type: string description: USD price as a fixed-point decimal string (4 decimals) required: true - name: ts_ms type: integer description: Unix timestamp in milliseconds. required: true - name: settlement_mark_price type: object required: false properties: - name: price type: string description: USD price as a fixed-point decimal string (4 decimals) required: true - name: ts_ms type: integer description: Unix timestamp in milliseconds. required: true - name: liquidation_mark_price type: object required: false properties: - name: price type: string description: USD price as a fixed-point decimal string (4 decimals) required: true - name: ts_ms type: integer description: Unix timestamp in milliseconds. required: true - name: funding_rate type: object required: false properties: - name: rate type: number description: Funding rate as a decimal value. required: true - name: next_funding_time_ms type: integer description: >- Unix timestamp in milliseconds for the next funding time. required: true - name: ts_ms type: integer description: >- Unix timestamp in milliseconds for the funding snapshot. required: true - name: ts_ms type: integer description: Unix timestamp in milliseconds. required: true headers: [] jsonPayloadSchema: type: object required: - type - sid - msg properties: type: type: string const: ticker x-parser-schema-id: sid: type: integer minimum: 1 description: Server-generated subscription identifier x-parser-schema-id: subscriptionId msg: type: object required: - market_ticker - price - bid - ask - bid_size_fp - ask_size_fp - last_trade_size_fp - volume - volume_notional_value_dollars - volume_24h - volume_24h_notional_value_dollars - open_interest - open_interest_notional_value_dollars - ts_ms properties: market_ticker: type: string description: Unique market identifier x-parser-schema-id: marketTicker price: type: string description: >- Last traded price in USD as a fixed-point decimal string (4 decimals). x-parser-schema-id: bid: type: string description: USD price as a fixed-point decimal string (4 decimals). x-parser-schema-id: ask: type: string description: USD price as a fixed-point decimal string (4 decimals). x-parser-schema-id: bid_size_fp: type: string x-parser-schema-id: ask_size_fp: type: string x-parser-schema-id: last_trade_size_fp: type: string x-parser-schema-id: volume: type: string description: One sided total trade volume in contracts. x-parser-schema-id: volume_notional_value_dollars: type: string description: Total notional value of one sided trade volume in dollars. x-parser-schema-id: volume_24h: type: string description: One sided trade volume in the last 24 hours in contracts. x-parser-schema-id: volume_24h_notional_value_dollars: type: string description: >- Total notional value of one sided trade volume in the last 24 hours in dollars. x-parser-schema-id: open_interest: type: string description: One sided open interest in contracts. x-parser-schema-id: open_interest_notional_value_dollars: type: string description: Total notional value of one sided open interest in dollars. x-parser-schema-id: reference_price: description: Reference price of underlying asset, when available. allOf: - &ref_0 type: object required: - price - ts_ms properties: price: type: string description: >- USD price as a fixed-point decimal string (4 decimals) x-parser-schema-id: ts_ms: type: integer format: int64 description: Unix timestamp in milliseconds. x-parser-schema-id: x-parser-schema-id: tickerPrice x-parser-schema-id: settlement_mark_price: *ref_0 liquidation_mark_price: *ref_0 funding_rate: type: object required: - rate - next_funding_time_ms - ts_ms properties: rate: type: number format: double description: Funding rate as a decimal value. x-parser-schema-id: next_funding_time_ms: type: integer format: int64 description: >- Unix timestamp in milliseconds for the next funding time. x-parser-schema-id: ts_ms: type: integer format: int64 description: Unix timestamp in milliseconds for the funding snapshot. x-parser-schema-id: x-parser-schema-id: fundingRate ts_ms: type: integer format: int64 description: Unix timestamp in milliseconds. x-parser-schema-id: x-parser-schema-id: x-parser-schema-id: marginTickerPayload title: Ticker Update description: Margin market ticker information example: No examples found bindings: [] extensions: - id: x-parser-unique-object-id value: ticker bindings: [] extensions: - id: x-parser-unique-object-id value: ticker sendOperations: [] receiveOperations: - *ref_1 sendMessages: [] receiveMessages: - *ref_2 extensions: - id: x-parser-unique-object-id value: ticker securitySchemes: - id: apiKey name: apiKey type: apiKey description: API key authentication required for margin WebSocket connections. in: user extensions: [] ````