V-Lab
Proshares S&P 500 EX-Technology ETF Asy. Power MEM Volatility Analysis
Volatility prediction for Monday, August 10th, 2026
1 Day
15.51%
decreased by 0.60%
1 Week
15.75%
decreased by 0.36%
1 Month
16.47%
increased by 0.36%
Analysis last updated: Saturday, August 8, 2026 at 02:27 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 27, 2015 to Aug 7, 2026Illiquid Asset
Model Insight
This asset shows a rare inverse leverage effect: positive returns raise next-day volatility 72% more than negative returns. Volatility rises more after gains than after losses, the reverse of the usual leverage effect and uncommon among risky assets.
μ
APMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0576 | 14.65*** |
α ARCH Response to squared shocks | 0.1026 | 13.07*** |
β GARCH Volatility persistence | 0.8506 | 118.93*** |
γ leverage Additional response to negative shocks | -0.1327 | -2.56** |
δ power Transformation power | 2.0333 | 13.09*** |
Persistence:
0.956
Half-life:
16 days
Other Proshares S&P 500 EX-Technology ETF Analyses
Other Asy. Power MEM Analyses on ETFs