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	param	t-stat
$ω$	2.1879	8.86
$α$	0.1369	6.49
$β$	0.6620	11.43
$γ_{1}$	-0.0223	-0.48
$γ_{2}$	0.2041	2.87
$γ_{3}$	-0.3327	-6.40
$γ_{4}$	0.2322	4.80
$γ_{5}$	-0.1114	-2.94
$γ_{6}$	0.0358	0.97
$γ_{7}$	-0.0036	-0.10
$γ_{8}$	-0.0036	-0.14

V-Lab

Severn Trent Plc Zero Slope Spline-GARCH Volatility Analysis

Volatility Prediction for Thursday, February 12th, 2026:29.95% (+4.20%)

Date Range:

Parameter Estimates

News Impact Curve

Volatility Forecasts

Other Severn Trent Plc Analyses