> ## Documentation Index > Fetch the complete documentation index at: https://docs.deribit.com/llms.txt > Use this file to discover all available pages before exploring further. # estimated_expiration_price.(index_name) > Estimated expiration (delivery) price updates for the given `index_name`. Provides calculated estimates of the ending price used around expirations/settlement. Useful for monitoring expected settlement levels. ## AsyncAPI ````yaml specifications/deribit_asyncapi.json estimated_expiration_price.(index_name) id: estimated_expiration_price.(index_name) title: 'estimated_expiration_price.(index_name) ' description: > Estimated expiration (delivery) price updates for the given `index_name`. Provides calculated estimates of the ending price used around expirations/settlement. Useful for monitoring expected settlement levels. servers: - id: production protocol: wss host: deribit.com/ws/api/v2 bindings: [] variables: [] - id: testnet protocol: wss host: test.deribit.com/ws/api/v2 bindings: [] variables: [] address: estimated_expiration_price.(index_name) parameters: - id: index_name jsonSchema: type: string description: >- Index identifier, matches (base) cryptocurrency with quote currency **Allowed values:** `btc_usd`, `eth_usd`, `ada_usdc`, `algo_usdc`, `avax_usdc`, ... (total 47 values) enum: - btc_usd - eth_usd - ada_usdc - algo_usdc - avax_usdc - bch_usdc - bnb_usdc - btc_usdc - btcdvol_usdc - buidl_usdc - doge_usdc - dot_usdc - eurr_usdc - eth_usdc - ethdvol_usdc - link_usdc - ltc_usdc - near_usdc - paxg_usdc - shib_usdc - sol_usdc - steth_usdc - ton_usdc - trump_usdc - trx_usdc - uni_usdc - usde_usdc - usyc_usdc - xrp_usdc - btc_usdt - eth_usdt - eurr_usdt - sol_usdt - steth_usdt - usdc_usdt - usde_usdt - btc_eurr - btc_usde - btc_usyc - eth_btc - eth_eurr - eth_usde - eth_usyc - steth_eth - paxg_btc - drbfix-btc_usdc - drbfix-eth_usdc description: >- Index identifier, matches (base) cryptocurrency with quote currency **Allowed values:** `btc_usd`, `eth_usd`, `ada_usdc`, `algo_usdc`, `avax_usdc`, ... (total 47 values) type: string required: true deprecated: false bindings: [] operations: - &ref_2 id: send_subscribe_estimated_expiration_price_index_name title: Send subscribe request for estimated_expiration_price description: Client sends subscription request for estimated_expiration_price updates type: send messages: - &ref_4 id: subscription_message contentType: application/json payload: - name: Subscription Notification Data description: Server sends subscription notification data type: object properties: - name: data type: object required: true properties: - name: seconds type: integer description: >- Number of seconds remaining until the expiration of the nearest expiring instrument required: false - name: price type: number description: >- The current index price or the estimated expiration price for the index. When `is_estimated` is `true`, this represents the calculated estimated ending price; otherwise, it is the current index price. required: false - name: is_estimated type: boolean description: >- Indicates whether the price is an estimated value. When `true`, the price represents a calculated estimated ending price for expiration. When `false`, the price is the current index price. required: false - name: left_ticks type: number description: >- Number of time ticks remaining until expiration. This field is only present when `is_estimated` is `true`. required: false - name: total_ticks type: number description: >- Total number of time ticks for the expiration period. This field is only present when `is_estimated` is `true`. required: false headers: [] jsonPayloadSchema: type: object description: Response containing notification data properties: data: type: object properties: seconds: type: integer description: >- Number of seconds remaining until the expiration of the nearest expiring instrument x-parser-schema-id: price: type: number description: >- The current index price or the estimated expiration price for the index. When `is_estimated` is `true`, this represents the calculated estimated ending price; otherwise, it is the current index price. example: 8247.27 x-parser-schema-id: is_estimated: type: boolean description: >- Indicates whether the price is an estimated value. When `true`, the price represents a calculated estimated ending price for expiration. When `false`, the price is the current index price. x-parser-schema-id: left_ticks: type: number description: >- Number of time ticks remaining until expiration. This field is only present when `is_estimated` is `true`. x-parser-schema-id: total_ticks: type: number description: >- Total number of time ticks for the expiration period. This field is only present when `is_estimated` is `true`. x-parser-schema-id: required: - seconds - price - is_estimated additionalProperties: false x-parser-schema-id: required: - data additionalProperties: false x-parser-schema-id: title: Subscription Notification Data description: Server sends subscription notification data example: |- { "data": { "is_estimated": false, "price": 3939.73, "seconds": 180929 } } bindings: [] extensions: - id: x-parser-unique-object-id value: subscription_message bindings: [] extensions: &ref_0 - id: x-parser-unique-object-id value: estimated_expiration_price.(index_name) - &ref_1 id: receive_estimated_expiration_price_index_name_updates title: Receive estimated_expiration_price updates description: Client receives estimated_expiration_price update notifications type: receive messages: - &ref_3 id: subscribe_request contentType: application/json payload: - name: Subscription Request description: >- Client sends subscription request to subscribe to notification channel. Please refer to [Notification page](https://deribit.mintlify.app/articles/notifications) for more information. type: object properties: [] headers: [] jsonPayloadSchema: properties: {} additionalProperties: false x-parser-schema-id: title: Subscription Request description: >- Client sends subscription request to subscribe to notification channel. Please refer to [Notification page](https://deribit.mintlify.app/articles/notifications) for more information. example: |- { "jsonrpc": "2.0", "method": "public/subscribe", "id": 42, "params": { "channels": [ "estimated_expiration_price.(index_name)" ] } } bindings: [] extensions: - id: x-parser-unique-object-id value: subscribe_request bindings: [] extensions: *ref_0 sendOperations: - *ref_1 receiveOperations: - *ref_2 sendMessages: - *ref_3 receiveMessages: - *ref_4 extensions: - id: x-parser-unique-object-id value: estimated_expiration_price.(index_name) securitySchemes: [] ````