{"record":{"id":"f0b85c191a9915d9","repo":"nautechsystems/nautilus_trader","slug":"no-price-available-for-vol-index-id","errorCode":null,"errorMessage":"No price available for {vol_index_id}","messagePattern":"No price available for (.+?)","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/common/src/greeks.rs","lineNumber":582,"sourceCode":"        let mut cost_of_carry = 0.0;\n\n        if let Some(dividend_curve) = dividend_curve {\n            cost_of_carry = interest_rate - dividend_curve(expiry_in_years);\n        } else if let Some(div_yield) = flat_dividend_yield {\n            cost_of_carry = interest_rate - div_yield;\n        }\n\n        let multiplier = instrument.multiplier();\n        let is_call = instrument.option_kind().unwrap_or(OptionKind::Call) == OptionKind::Call;\n        let strike = instrument.strike_price().unwrap_or_default().as_f64();\n        let option_price = self\n            .get_price(&instrument_id)\n            .ok_or_else(|| anyhow::anyhow!(\"No price available for {instrument_id}\"))?;\n        let underlying_price = self.get_underlying_price(&underlying_instrument_id)?;\n\n        if let Some(vol_index_id) = vol_index_instrument_id {\n            self.get_price(&vol_index_id)\n                .ok_or_else(|| anyhow::anyhow!(\"No price available for {vol_index_id}\"))?;\n        }\n        let greeks = if update_vol {\n            let cached_greeks = self.cache.borrow().greeks(&instrument_id);\n            match cached_greeks {\n                Some(cached_greeks) => refine_vol_and_greeks(\n                    underlying_price,\n                    interest_rate,\n                    cost_of_carry,\n                    is_call,\n                    strike,\n                    expiry_in_years,\n                    option_price,\n                    cached_greeks.vol,\n                ),\n                None => imply_vol_and_greeks(\n                    underlying_price,\n                    interest_rate,\n                    cost_of_carry,","sourceCodeStart":564,"sourceCodeEnd":600,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/common/src/greeks.rs#L564-L600","documentation":"calculate_option_greeks optionally uses a volatility index (e.g. VIX) instrument; when a vol_index_instrument_id is supplied, its price is fetched and must exist. If get_price returns None for the vol index id, this error is raised. The calculation refuses to proceed with an incomplete volatility input.","triggerScenarios":"Passing Some(vol_index_instrument_id) to instrument_greeks while the vol index has no cached price — index data never subscribed, wrong index id, or the venue does not quote that index.","commonSituations":"Using VIX/Nikkei-style index ids not actually fed into the backtest/live data pipeline; id formatting mismatch (e.g. .VIX vs .IND); computing greeks with vol index before index quotes arrive.","solutions":["Subscribe to and cache the vol index data before passing its id to greeks calculations","Verify the vol index instrument id against the instrument provider/cache exactly","Pass None for vol_index_instrument_id if the index is not actually required","Pre-check get_price for the vol index and skip or defer the greeks computation when absent"],"exampleFix":"// before\nlet greeks = calculator.instrument_greeks(&option_id, None, None, Some(&vix_id), None)?;\n// after\nif calculator.get_price(&vix_id).is_some() {\n    let greeks = calculator.instrument_greeks(&option_id, None, None, Some(&vix_id), None)?;\n} else {\n    let greeks = calculator.instrument_greeks(&option_id, None, None, None, None)?;\n}","handlingStrategy":"fallback","validationCode":"if let Some(vix) = &vol_index_id {\n    if calculator.get_price(vix).is_none() {\n        log::warn!(\"vol index {vix} unpriced; computing greeks without it\");\n        return calculator.instrument_greeks(&option_id, None, None, None, None);\n    }\n}","typeGuard":null,"tryCatchPattern":"match calculator.instrument_greeks(&option_id, None, None, vol_index_id, None) {\n    Ok(g) => g,\n    Err(e) if e.to_string().contains(&vol_index_id.to_string()) => {\n        calculator.instrument_greeks(&option_id, None, None, None, None)\n    }\n    Err(e) => return Err(e),\n}","preventionTips":["Only pass vol_index_instrument_id when its data feed is confirmed active","Check index id formatting against the data provider (e.g. NIKKEI225 .IND vs venue suffix)","Fall back to index-less greeks when the vol index is optional for your use case"],"tags":["greeks","volatility-index","missing-data","pricing"],"backgroundTag":"empty-result-set","analyzedSha":"18893faf8b356be3320add8de2f861b0b647cf06","analyzedAt":"2026-09-08T20:49:34.690Z","contentChangedAt":"2026-09-08T20:49:34.690Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}