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V-Lab

Hong Kong Dollar GAS-GARCH Student T Volatility Analysis

Volatility prediction for Wednesday, August 19th, 2026

1 Day

5.35%

increased by 0.84%

1 Week

5.42%

increased by 0.91%

1 Month

5.67%

increased by 1.16%

Analysis last updated: Tuesday, August 18, 2026 at 07:42 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Hong Kong Dollar GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Sep 30, 2003 to Aug 14, 2026

Model Insight

The estimated Student-t degrees of freedom v = 2.00 sit at the infinite-variance boundary (v → 2): the model is attributing extreme moves to heavy tails rather than to volatility, so the volatility scale is unreliable here. See the boundary-parameters flag.

𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.5312
9.37***
α

ARCH

Response to squared shocks

0.0897
161.85***
β

GARCH

Volatility persistence

0.9990
9,605.77***
ν

DF

Student-t tail thickness

2.0008

Persistence:

0.999

Half-life:

693 days