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V-Lab

Nanjing Vazyme Biotech Co Ltd GAS-GARCH Student T Volatility Analysis

Volatility prediction for Tuesday, September 15th, 2026

1 Day

71.74%

increased by 7.47%

1 Week

71.86%

increased by 7.59%

1 Month

72.29%

increased by 8.02%

Analysis last updated: Wednesday, September 16, 2026 at 03:55 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

All

graph of Nanjing Vazyme Biotech Co Ltd GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 15, 2021 to Sep 14, 2026

Model Insight

With persistence 0.991, volatility shocks have a half-life of 73 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 4.14 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

High persistence: persistence 0.991, shock half-life ~73 daysv = 4.14 · fat tails
ParamValuet-stat
ωconst23.9736
1.14
αARCH0.0972
8.63***
βGARCH0.9906
142.67***
νDF4.1365
3.43***

0.991

Persistence

73d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

23.9736
1.14
α

ARCH

Response to squared shocks

0.0972
8.63***
β

GARCH

Volatility persistence

0.9906
142.67***
ν

DF

Student-t tail thickness

4.1365
3.43***

Persistence:

0.991

Half-life:

73 days