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V-Lab

Shanghai Shenzhen CSI 300 Index Asy. MEM Volatility Analysis

Volatility prediction for Tuesday, July 21st, 2026

1 Day

30.46%

decreased by 0.68%

1 Week

30.48%

decreased by 0.66%

1 Month

30.53%

decreased by 0.61%

Analysis last updated: Monday, July 20, 2026 at 08:02 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Shanghai Shenzhen CSI 300 Index AMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Apr 8, 2005 to Jul 17, 2026

Model Insight

With persistence 0.994, volatility shocks have a half-life of 106 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 34% more than positive returns

μ

AMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0257
20.60***
α

ARCH

Response to squared shocks

0.1332
24.32***
β

GARCH

Volatility persistence

0.8379
246.72***
γ

leverage

Additional response to negative shocks

0.0449
5.68***

Persistence:

0.994

Half-life:

106 days