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V-Lab

Softbank Group Corp GAS-GARCH Student T Volatility Analysis

Volatility prediction for Wednesday, August 5th, 2026

1 Day

81.98%

increased by 4.75%

1 Week

81.74%

increased by 4.51%

1 Month

80.80%

increased by 3.57%

Analysis last updated: Wednesday, August 5, 2026 at 06:42 PM UTC

Date Range:

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to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of Softbank Group Corp GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Feb 16, 2000 to Jul 31, 2026

Model Insight

With persistence 0.993, volatility shocks have a half-life of 101 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 5.71 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

14.9758
4.59***
α

ARCH

Response to squared shocks

0.0780
44.03***
β

GARCH

Volatility persistence

0.9932
689.24***
ν

DF

Student-t tail thickness

5.7100
10.76***

Persistence:

0.993

Half-life:

101 days