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V-Lab

Shengfeng Development Ltd Spline-GARCH Volatility Analysis

Volatility prediction for Tuesday, July 21st, 2026

1 Day

128.02%

decreased by 1.93%

1 Week

146.30%

increased by 16.35%

1 Month

151.47%

increased by 21.52%

Analysis last updated: Monday, July 20, 2026 at 09:33 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

All

graph of Shengfeng Development Ltd SGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Mar 31, 2023 to Jul 17, 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 1 trading day.

τ

Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.7049
2.42**
α

ARCH

Response to squared shocks

0.2989
2.46**
β

GARCH

Volatility persistence

0.0070
0.09
γi Spline Coefficients
K=10
γ10.5540
0.05
γ2-8.8072
-0.48
γ325.1358
1.35
γ4-41.0782
-1.65*
γ541.8989
1.93*
γ6-23.4921
-2.08**
γ716.5103
1.51
γ8-16.7972
-1.00
γ9-2.2753
-0.10
γ1030.6941
1.13

Persistence:

0.306

Half-life:

1 days