> ## Documentation Index > Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt > Use this file to discover all available pages before exploring further. # Calculate equity-volatility-index values across dates. > Use this operation to evaluate equity-volatility-index surfaces at requested strikes and one maturity on each business day in an inclusive range. A non-business start date moves to the following business day. Results can include data from authorised provider and organisation scopes, with Derivitec fallback, and no market data is changed. ## OpenAPI ````yaml /risk-and-pricing/atoti-risk-services/apis-endpoints/openapi/openapi.mintlify.json post /api/MarketData/GetEquityVolIndexVols openapi: 3.0.4 info: title: Derivitec Api 1.0 version: '1.0' servers: - url: https://api.riskportal.activeviam.com security: - oauth2: [] - apikey: [] tags: - name: AdminUser - name: AtotiReport - name: AtotiSession - name: BloombergOAuth - name: Bond - name: BondYieldCurvePage - name: BookAccess - name: Books - name: Commodity - name: Counterparties - name: Currencies - name: Equity - name: EquityDividend - name: EquityPage - name: FeatureFlag - name: Fx - name: FxPage - name: GroupAccess - name: Home - name: LegacyPosition - name: MarketData - name: MarketDataProvider - name: MarketDataProviderAccess - name: Meta - name: Notification - name: Organisation - name: PnLReport - name: PortfolioAccess - name: Portfolios - name: Position - name: PositionFilter - name: PricingEnvironment - name: PricingEnvironmentAccess - name: RateAsset - name: RateAssetPage - name: Report - name: ReportDefinition - name: ReportHistoryLauncherQuery - name: ReportLauncher - name: ReportQuery - name: ReportQueryViewUser - name: ReportRestriction - name: ReportView - name: RiskReport - name: Tradable - name: TradeBooking - name: User - name: VarReport - name: VarReportQuery - name: YieldCurvePage paths: /api/MarketData/GetEquityVolIndexVols: post: tags: - MarketData summary: Calculate equity-volatility-index values across dates. description: >- Use this operation to evaluate equity-volatility-index surfaces at requested strikes and one maturity on each business day in an inclusive range. A non-business start date moves to the following business day. Results can include data from authorised provider and organisation scopes, with Derivitec fallback, and no market data is changed. operationId: GetEquityVolIndexVols requestBody: description: >- The calculation payload. Supply one volatility-index `Identifier`, inclusive `StartDate` and `EndDate` values, strikes interpreted by `StrikeType`, `Maturity` in days, and optional provider scope. content: application/json-patch+json: schema: $ref: '#/components/schemas/ApiGetEquityVolIndexVolsRequest' application/json: schema: $ref: '#/components/schemas/ApiGetEquityVolIndexVolsRequest' text/json: schema: $ref: '#/components/schemas/ApiGetEquityVolIndexVolsRequest' application/*+json: schema: $ref: '#/components/schemas/ApiGetEquityVolIndexVolsRequest' responses: '200': description: >- Returns evaluated volatility-index values for each available surface date and any identifier, surface, or calculation errors. content: application/json: schema: $ref: '#/components/schemas/ApiGetEquityVolIndexVolsResponse' '400': description: BadRequest '401': description: Unauthorized '403': description: Forbidden security: - oauth2: [] - apikey: [] components: schemas: ApiGetEquityVolIndexVolsRequest: required: - $type type: object properties: market_data_environment_name: type: string description: >- Name of the market-data environment to use. Supply either this name or `provider_id`, not both. nullable: true example: Example market data provider_id: type: string description: >- Opaque identifier of the market-data provider to use. Supply either this identifier or `market_data_environment_name`, not both. nullable: true identifier: $ref: '#/components/schemas/InstrumentIdentifier' start_date: type: string description: Inclusive lower date-only boundary for the requested observations. format: date-time end_date: type: string description: Inclusive upper date-only boundary for the requested observations. format: date-time strikes: type: array items: type: number format: double description: Strike coordinates for the requested volatility observations. nullable: true maturity: type: integer description: Maturity as a day offset for the requested volatility observations. format: int32 strike_type: enum: - absolute - logarithmic - normalized - logarithmic_spot type: string description: Interpretation of the requested strike coordinates. $type: type: string enum: - >- Derivitec.Web.Core.MarketData.ApiGetEquityVolIndexVolsRequest, Derivitec.Web.Core additionalProperties: false description: Selects volatility observations for an equity-volatility index. ApiGetEquityVolIndexVolsResponse: required: - $type type: object properties: is_success: type: boolean description: >- Whether the operation completed successfully. The default is `true`; error outcomes set it to `false`. example: true error_messages: type: array items: type: string description: >- Messages explaining operation-level failures. The collection is empty by default. nullable: true volatility_data: type: array items: $ref: '#/components/schemas/VolatilityData' description: >- Dated volatility observations for the selected index and coordinates. nullable: true $type: type: string enum: - >- Derivitec.Web.Core.MarketData.ApiGetEquityVolIndexVolsResponse, Derivitec.Web.Core additionalProperties: false description: >- Returns volatility observations for the selected equity-volatility index. InstrumentIdentifier: description: >- Instrument code qualified by an identifier namespace and optional market code. discriminator: propertyName: $type mapping: Derivitec.Web.Core.MarketData.InstrumentIdentifier, Derivitec.Web.Core: '#/components/schemas/InstrumentIdentifierMintlifyShape' Derivitec.Web.Core.MarketData.InstrumentInfo, Derivitec.Web.Core: '#/components/schemas/InstrumentInfo' oneOf: - $ref: '#/components/schemas/InstrumentIdentifierMintlifyShape' - $ref: '#/components/schemas/InstrumentInfo' VolatilityData: required: - $type type: object properties: date: type: string description: Date of the volatility slice. format: date-time strike_type: enum: - absolute - logarithmic - normalized - logarithmic_spot type: string description: >- Coordinate convention used by the strike values. Defaults to absolute. strikes: type: array items: type: number format: double description: Strike-coordinate values carried by the slice. nullable: true vols: type: array items: type: number format: double description: Volatility observations carried by the slice. nullable: true $type: type: string enum: - Derivitec.Web.Core.MarketData.VolatilityData, Derivitec.Web.Core additionalProperties: false description: Dated volatility slice containing strikes and volatility observations. InstrumentIdentifierMintlifyShape: required: - $type type: object properties: code: type: string description: Instrument code interpreted in the selected identifier namespace. nullable: true identifier_type: enum: - Derivitec - Ric - Bloomberg - Isin - Figi - Sedol - RedCode - RedPairCode - BloombergYellow - XIgniteCode - CBondsId - EdiSecId - EdiSymbol - Cusip - NotSet type: string description: Namespace that determines how the instrument code is interpreted. market_identification_code: type: string description: >- Optional market identification code that further qualifies the instrument code. nullable: true $type: type: string enum: - >- Derivitec.Web.Core.MarketData.InstrumentIdentifier, Derivitec.Web.Core additionalProperties: false description: >- Instrument code qualified by an identifier namespace and optional market code. InstrumentInfo: required: - $type type: object properties: code: type: string description: Instrument code interpreted in the selected identifier namespace. nullable: true identifier_type: enum: - Derivitec - Ric - Bloomberg - Isin - Figi - Sedol - RedCode - RedPairCode - BloombergYellow - XIgniteCode - CBondsId - EdiSecId - EdiSymbol - Cusip - NotSet type: string description: Namespace that determines how the instrument code is interpreted. market_identification_code: type: string description: >- Optional market identification code that further qualifies the instrument code. nullable: true name: type: string description: Human-readable name of the identified instrument. nullable: true $type: type: string enum: - Derivitec.Web.Core.MarketData.InstrumentInfo, Derivitec.Web.Core additionalProperties: false description: Instrument identifier with a human-readable instrument name. securitySchemes: oauth2: type: oauth2 description: >- OAuth2 access-token requested from AWS Cognito and provided as a Auth Bearer header flows: implicit: authorizationUrl: https://auth.riskportal.derivitec.com/oauth2/authorize scopes: {} apikey: type: apiKey description: API-Key requested via the site and provided as a header name: x-api-key in: header ````