arch.univariate.EWMAVariance.bounds¶ EWMAVariance.bounds(resids: ndarray[Any, dtype[float64]]) → list[tuple[float, float]][source]¶ Returns bounds for parameters Parameters:¶ resids: ndarray[Any, dtype[float64]]¶Vector of (approximate) residuals Returns:¶ bounds – List of bounds where each element is (lower, upper). Return type:¶ list[tuple[float,float]]