News Corp MEM Volatility Analysis
Volatility prediction for Wednesday, October 21st, 2026
1 Day
22.49%
increased by 0.48%
1 Week
23.75%
increased by 1.74%
1 Month
26.51%
increased by 4.50%
Analysis last updated: Tuesday, October 20, 2026 at 10:09 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jun 19, 2013 to Oct 16, 2026Model Insight
Volatility shocks decay with a half-life of 8 trading days, meaning a shock loses half its impact after approximately 8 days.
μ
MEM Model
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Shock decay: Shocks decay with a 8-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.2979 | 3.16*** |
| αARCH | 0.3303 | 6.94*** |
| βGARCH | 0.5843 | 18.50*** |
0.915
Persistence8d
Half-lifeμ
MEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.2979 | 3.16*** |
α ARCH Response to squared shocks | 0.3303 | 6.94*** |
β GARCH Volatility persistence | 0.5843 | 18.50*** |
Persistence:
0.915
Half-life:
8 days
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