S&P/ASX 200 AGARCH Volatility Analysis
Volatility prediction for Friday, October 16th, 2026
1 Day
11.80%
decreased by 0.29%
1 Week
12.00%
decreased by 0.09%
1 Month
12.60%
increased by 0.51%
Analysis last updated: Friday, October 16, 2026 at 01:02 AM UTC
Press Delete or Backspace to remove this series.
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 29, 1992 to Oct 9, 2026Model Insight
The news-impact curve is shifted (γ = 0.54) so that negative returns raise next-day volatility more than positive returns of the same size. The gap is largest for small shocks and narrows for larger ones.
σ
AGARCH Model
Tap to view equation
Asymmetry: negative returns raise volatility more
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0030 | 0.49 |
| αARCH | 0.0820 | 9.81*** |
| βGARCH | 0.8863 | 86.63*** |
| γleverage | 0.5390 | 7.75*** |
0.968
Persistence22d
Half-lifeσ
AGARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0030 | 0.49 |
α ARCH Response to squared shocks | 0.0820 | 9.81*** |
β GARCH Volatility persistence | 0.8863 | 86.63*** |
γ leverage Additional response to negative shocks | 0.5390 | 7.75*** |
Persistence:
0.968
Half-life:
22 days
Other AGARCH Analyses on Equity Indices