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	param	t-stat
$ω$	1.3652	7.72
$α$	0.1026	10.20
$β$	0.8655	73.65
$γ_{1}$	0.0893	6.46
$γ_{2}$	-0.1412	-6.32
$γ_{3}$	0.0815	5.01
$γ_{4}$	-0.0535	-3.60
$γ_{5}$	0.0473	2.77
$γ_{6}$	-0.0334	-2.55

V-Lab

S&P 500 Index Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Friday, December 26th, 2025:12.46% (-0.38%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other S&P 500 Index Analyses