Skip to main content
V-Lab
V-Lab

BGI Group Joint Stock Co Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

33.80%

decreased by 1.16%

1 Week

35.07%

increased by 0.11%

1 Month

38.19%

increased by 3.23%

Analysis last updated: Sunday, September 20, 2026 at 04:30 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of BGI Group Joint Stock Co S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

May 4, 2011 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 10 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
ωconst1.1444
6.24***
αARCH0.0989
6.64***
βGARCH0.8335
28.40***
γi Spline Coefficients
K=6
γ10.0642
0.66
γ2-0.1916
-1.28
γ30.3139
2.81***
γ4-0.2571
-2.60***
γ5-0.0134
-0.16
γ60.1500
2.66***

0.932

Persistence

10d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.1444
6.24***
α

ARCH

Response to squared shocks

0.0989
6.64***
β

GARCH

Volatility persistence

0.8335
28.40***
γi Spline Coefficients
K=6
γ10.0642
0.66
γ2-0.1916
-1.28
γ30.3139
2.81***
γ4-0.2571
-2.60***
γ5-0.0134
-0.16
γ60.1500
2.66***

Persistence:

0.932

Half-life:

10 days