Boeing Co/The APARCH Volatility Analysis
Volatility prediction for Tuesday, October 20th, 2026
1 Day
30.59%
1 Week
30.76%
1 Month
31.35%
Analysis last updated: Monday, October 19, 2026 at 09:35 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Oct 16, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 196% more than equivalent positive returns. The volatility power δ = 1.45 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.
APARCH Model
Tap to view equation
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0412 | 3.30*** |
| αARCH | 0.0613 | 7.03*** |
| βGARCH | 0.9336 | 126.29*** |
| γleverage | 0.3585 | 4.80*** |
| δpower | 1.4480 | 6.96*** |
0.988
Persistence57d
Half-lifeAPARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0412 | 3.30*** |
α ARCH Response to squared shocks | 0.0613 | 7.03*** |
β GARCH Volatility persistence | 0.9336 | 126.29*** |
γ leverage Additional response to negative shocks | 0.3585 | 4.80*** |
δ power Transformation power | 1.4480 | 6.96*** |
Persistence:
0.988
Half-life:
57 days
Other APARCH Analyses on Equities