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V-Lab

Hangzhou Prevail Optoelectronic Equipment Co., Ltd. EGARCH Volatility Analysis

Volatility prediction for Friday, September 4th, 2026

1 Day

48.66%

decreased by 1.10%

1 Week

50.38%

increased by 0.62%

1 Month

54.62%

increased by 4.86%

Analysis last updated: Friday, September 4, 2026 at 06:33 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

All

graph of Hangzhou Prevail Optoelectronic Equipment Co., Ltd. EGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Oct 19, 2017 to Aug 28, 2026

Model Insight

Volatility shocks decay with a half-life of 7 trading days, meaning a shock loses half its impact after approximately 7 days.

σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.2411
4.27***
α

ARCH

Response to squared shocks

0.2940
6.18***
β

GARCH

Volatility persistence

0.9091
42.00***
γ

leverage

Additional response to negative shocks

0.0181
0.40

Persistence:

0.909

Half-life:

7 days