V-Lab
Tortoise Nuclear Renaissance ETF APARCH Volatility Analysis
Volatility prediction for Monday, August 10th, 2026
1 Day
30.01%
decreased by 4.18%
1 Week
31.73%
decreased by 2.46%
1 Month
33.12%
decreased by 1.07%
Analysis last updated: Saturday, August 8, 2026 at 02:28 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 18, 2025 to Aug 7, 2026Boundary Parameters
Model Insight
Volatility shocks decay with a half-life of 2 trading days, meaning a shock loses half its impact after approximately 2 days. The volatility power δ = 0.50 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.
σ
APARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.4784 | 9.15*** |
α ARCH Response to squared shocks | 0.1044 | 5.68*** |
β GARCH Volatility persistence | 0.6105 | 14.60*** |
γ leverage Additional response to negative shocks | 1.0000 | 724.63*** |
δ power Transformation power | 0.5000 | 4.90*** |
Persistence:
0.671
Half-life:
2 days
Other Tortoise Nuclear Renaissance ETF Analyses
Other APARCH Analyses on ETFs