V-Lab
British Pound Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 19th, 2026
1 Day
4.97%
decreased by 0.05%
1 Week
5.00%
decreased by 0.02%
1 Month
5.12%
increased by 0.10%
Analysis last updated: Tuesday, August 18, 2026 at 07:42 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Aug 14, 2026Model Insight
With persistence 0.994, volatility shocks have a half-life of 122 trading days (~0.5 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0493 | 8.44*** |
α ARCH Response to squared shocks | 0.0303 | 6.22*** |
β GARCH Volatility persistence | 0.9641 | 186.36*** |
Spline Coefficients
K=1
| γ1 | 0.0001 | 0.75 |
Persistence:
0.994
Half-life:
122 days
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