4 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
When to use: book reval on an IV surface under F/rate/time/vol shocks with sticky moneyness|strike|fixed_vol. Vol order: interpolate → volAbs → volRel → smileTwist*k. Greeks are sticky-σ BS Greeks (not smile bump deltas)...
When to use: book of market premiums → need IV grid + per-quote Greeks (not a single contract). Shared rate/yield; each row has its own underlying (power/commodity forwards by maturity). Returns strike×maturity IV surfac...
When to use: you already have an IV surface (k,T,σ) and need to price options on it — not invert premiums and not scalar σ. Interpolates total variance w=σ²T bilinear in log-moneyness k=ln(K/F); wingRule=flat_vol. Return...
When to use: one market premium → need σ̂ + Greeks; cheaper/faster than a full surface. Solves Black-Scholes IV then prices Greeks at the solved σ. Same engine as the surface endpoint (fastImpliedVol). Prefer surface whe...