Optional ReadonlydistOptional ReadonlyexogenousGARCH-X: x aligned with the returns (garch and gjr); see FitOptions.exogenous. Forecasts hold it at its last value.
ReadonlyhorizonOptional ReadonlymeanA fitted constant (default) or zero; see FitOptions.mean.
Optional ReadonlyminOptional ReadonlymodelReadonlyreturnsOptional ReadonlyrivalsAlso return the rival optima within this many log-likelihood units of the best.
Optional ReadonlystepOptional ReadonlytargetVariance targeting (garch and gjr); see FitOptions.targetVariance.
The two whole questions a caller asks, as plain data in and out — so they can cross a worker boundary (structured clone) unchanged.