V-Lab
Diana Tea Co Ltd Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
38.05%
decreased by 0.03%
1 Week
41.82%
increased by 3.74%
1 Month
47.93%
increased by 9.85%
Analysis last updated: Sunday, July 26, 2026 at 01:15 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 4, 2008 to Jul 24, 2026Model 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 5 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0506 | 11.19*** |
α ARCH Response to squared shocks | 0.1744 | 6.11*** |
β GARCH Volatility persistence | 0.6916 | 16.00*** |
Spline Coefficients
K=1
| γ1 | 0.0001 | 0.25 |
Persistence:
0.866
Half-life:
5 days
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