--- title: "Changes to Create Market In Multivariate Event Collection" method: POST path: "/multivariate_event_collections/{collection_ticker}" --- # Changes to Create Market In Multivariate Event Collection `POST /multivariate_event_collections/{collection_ticker}` > Every recorded change to this operation, newest first. ## Timeline Changed in 14 of 69 revisions. - **2026-11-02** `e6691cdd1915`: 1 info - **2026-09-29** `dde105932d49`: 2 info - **2026-09-25** `7a870e939ec6`: 1 warning - **2026-07-31** `a07481be8bf9`: 4 warning - **2026-07-13** `a671b3e77f35`: 3 breaking, 1 warning, 1 info - **2026-05-18** `7e31fc4590e0`: 1 warning, 3 info - **2026-04-13** `218c1f661cbd`: 18 breaking, 1 warning - **2026-03-08** `0efefc7b0f73`: 4 info - **2026-02-14** `d4973326079e`: 1 info - **2026-01-26** `ea5437268cb9`: 1 warning, 5 info - **2026-01-13** `a0b9f0879fd3`: 2 info - **2025-12-02** `02c9ca7d135f`: 2 info - **2025-11-06** `6ad7527f54aa`: 5 breaking, 8 info - **2025-10-17** `6ce8fe6c1c3b`: 2 breaking ## Changes - **2026-11-02** `e6691cdd1915`: 1 info - response property `market/no_sub_title` deprecated - **2026-09-29** `dde105932d49`: 2 info - added the optional property `market/settlement_floor_dollars` to the response with the `200` status - added the required property `market/settlement_bounds_type` to the response with the `200` status - **2026-09-25** `7a870e939ec6`: 1 warning - removed the optional property `market/liquidity_dollars` from the response with the `200` status - **2026-07-31** `a07481be8bf9`: 4 warning - removed the optional property `service` from the response with the `400` status - removed the optional property `service` from the response with the `401` status - removed the optional property `service` from the response with the `429` status - removed the optional property `service` from the response with the `500` status - **2026-07-13** `a671b3e77f35`: 3 breaking, 1 warning, 1 info - the response property `market/liquidity_dollars` became optional for the status `200` - the `market/liquidity_dollars` response's property type changed from `string` to no type for status `200` - removed the required property `market/fractional_trading_enabled` from the response with the `200` status - removed the optional property `market/response_price_units` from the response with the `200` status - added `#/components/schemas/FixedPointDollars` to the `market/liquidity_dollars` response property `allOf` list for the response status `200` - **2026-05-18** `7e31fc4590e0`: 1 warning, 3 info - removed the optional property `market/tick_size` from the response with the `200` status - added the optional property `market/exchange_index` to the response with the `200` status - added the optional property `market/occurrence_datetime` to the response with the `200` status - response property `market/fractional_trading_enabled` deprecated - **2026-04-13** `218c1f661cbd`: 18 breaking, 1 warning - the response property `market/expiration_time` became optional for the status `200` - the response property `market/response_price_units` became optional for the status `200` - the response property `market/subtitle` became optional for the status `200` - the response property `market/tick_size` became optional for the status `200` - the response property `market/title` became optional for the status `200` - removed the required property `market/last_price` from the response with the `200` status - removed the required property `market/liquidity` from the response with the `200` status - removed the required property `market/no_ask` from the response with the `200` status - removed the required property `market/no_bid` from the response with the `200` status - removed the required property `market/notional_value` from the response with the `200` status - removed the required property `market/open_interest` from the response with the `200` status - removed the required property `market/previous_price` from the response with the `200` status - removed the required property `market/previous_yes_ask` from the response with the `200` status - removed the required property `market/previous_yes_bid` from the response with the `200` status - removed the required property `market/volume` from the response with the `200` status - removed the required property `market/volume_24h` from the response with the `200` status - removed the required property `market/yes_ask` from the response with the `200` status - removed the required property `market/yes_bid` from the response with the `200` status - removed the optional property `market/settlement_value` from the response with the `200` status - **2026-03-08** `0efefc7b0f73`: 4 info - added the non-success response with the status `429` - response property `market/liquidity_dollars` deprecated - added the required property `market/yes_ask_size_fp` to the response with the `200` status - added the required property `market/yes_bid_size_fp` to the response with the `200` status - **2026-02-14** `d4973326079e`: 1 info - added the required property `market/fractional_trading_enabled` to the response with the `200` status - **2026-01-26** `ea5437268cb9`: 1 warning, 5 info - added the new `scalar` enum value to the `market/result` response property for the response status `200` - added the optional property `market/mve_selected_legs/items/yes_settlement_value_dollars` to the response with the `200` status - added the required property `market/open_interest_fp` to the response with the `200` status - added the required property `market/updated_time` to the response with the `200` status - added the required property `market/volume_24h_fp` to the response with the `200` status - added the required property `market/volume_fp` to the response with the `200` status - **2026-01-13** `a0b9f0879fd3`: 2 info - added the new optional request property `with_market_payload` - added the optional property `market` to the response with the `200` status - **2025-12-02** `02c9ca7d135f`: 2 info - api tag `multivariate` added - api tag `collection` removed - **2025-11-06** `6ad7527f54aa`: 5 breaking, 8 info - request property `selected_markets/items/side` was restricted to a list of enum values - the request property `selected_markets` became required - the request property `selected_markets/items/event_ticker` became required - the request property `selected_markets/items/market_ticker` became required - the request property `selected_markets/items/side` became required - the endpoint scheme security `kalshiAccessKey AND kalshiAccessSignature AND kalshiAccessTimestamp` was added to the API - added the new `no` enum value to the request property `selected_markets/items/side` - added the new `yes` enum value to the request property `selected_markets/items/side` - added the non-success response with the status `400` - added the non-success response with the status `401` - added the non-success response with the status `500` - the response property `event_ticker` became required for the status `200` - the response property `market_ticker` became required for the status `200` - **2025-10-17** `6ce8fe6c1c3b`: 2 breaking - removed the enum value `no` of the request property `selected_markets/items/side` - removed the enum value `yes` of the request property `selected_markets/items/side` --- [Operation](https://skmtc.dev/kalshi/apis/kalshi-trade-api-manual-endpoints/docs/multivariate_event_collections/:collection_ticker/post.md) - [API](https://skmtc.dev/kalshi/apis/kalshi-trade-api-manual-endpoints.md) - [Page](https://skmtc.dev/kalshi/apis/kalshi-trade-api-manual-endpoints/changes/multivariate_event_collections/:collection_ticker/post)