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V-Lab

Smart Powerr Corp Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

159.52%

decreased by 1.82%

1 Week

179.69%

increased by 18.35%

1 Month

197.48%

increased by 36.14%

Analysis last updated: Saturday, September 19, 2026 at 09:27 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Smart Powerr Corp S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jul 4, 2001 to Sep 18, 2026

Model Insight

This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 2 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

Time-varying baseline: volatility reverts to a slowly-shifting spline trend
ParamValuet-stat
ωconst4.0795
4.53***
αARCH0.2761
7.70***
βGARCH0.4501
7.67***
γi Spline Coefficients
K=9
γ10.6111
5.02***
γ2-1.0286
-6.10***
γ30.8348
7.10***
γ4-0.6433
-5.29***
γ50.4044
2.88***
γ6-0.2728
-1.19
γ7-0.0403
-0.15
γ80.4624
2.21**
γ9-0.5191
-3.98***

0.726

Persistence

2d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

4.0795
4.53***
α

ARCH

Response to squared shocks

0.2761
7.70***
β

GARCH

Volatility persistence

0.4501
7.67***
γi Spline Coefficients
K=9
γ10.6111
5.02***
γ2-1.0286
-6.10***
γ30.8348
7.10***
γ4-0.6433
-5.29***
γ50.4044
2.88***
γ6-0.2728
-1.19
γ7-0.0403
-0.15
γ80.4624
2.21**
γ9-0.5191
-3.98***

Persistence:

0.726

Half-life:

2 days