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V-Lab

China Yangtze Power Co Ltd Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Tuesday, September 15th, 2026

1 Day

16.15%

decreased by 0.24%

1 Week

16.21%

decreased by 0.18%

1 Month

16.42%

increased by 0.03%

Analysis last updated: Wednesday, September 16, 2026 at 03:51 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of China Yangtze Power Co Ltd S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 18, 2003 to Sep 14, 2026

Model Insight

With persistence 0.990, volatility shocks have a half-life of 70 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

High persistence: persistence 0.990, shock half-life ~70 days
ParamValuet-stat
ωconst1.2740
6.53***
αARCH0.0513
7.35***
βGARCH0.9389
115.98***
γi Spline Coefficients
K=1
γ10.0018
2.36**

0.990

Persistence

70d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.2740
6.53***
α

ARCH

Response to squared shocks

0.0513
7.35***
β

GARCH

Volatility persistence

0.9389
115.98***
γi Spline Coefficients
K=1
γ10.0018
2.36**

Persistence:

0.990

Half-life:

70 days