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V-Lab

Vinacomin Vang Danh Coal Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Friday, July 24th, 2026

1 Day

22.84%

decreased by 0.77%

1 Week

22.95%

decreased by 0.66%

1 Month

23.12%

decreased by 0.49%

Analysis last updated: Friday, July 24, 2026 at 08:31 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Vinacomin Vang Danh Coal S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Aug 10, 2011 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 4 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.5755
6.35***
α

ARCH

Response to squared shocks

0.1482
5.64***
β

GARCH

Volatility persistence

0.6903
12.32***
γi Spline Coefficients
K=9
γ10.2919
1.08
γ2-0.5786
-1.26
γ30.8152
2.35**
γ4-1.0434
-4.12***
γ50.7734
3.49***
γ6-0.0544
-0.22
γ7-0.7655
-3.05***
γ80.8002
3.45***
γ9-0.1638
-0.94

Persistence:

0.838

Half-life:

4 days