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V-Lab
V-Lab

Bangladesh Dhaka Stock Exchange Broad Index GAS-GARCH Student T Volatility Analysis

Volatility prediction for Sunday, October 25th, 2026

1 Day

7.19%

increased by 0.08%

1 Week

7.37%

increased by 0.26%

1 Month

8.04%

increased by 0.93%

Analysis last updated: Thursday, October 22, 2026 at 05:43 PM UTC

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Date Range:

from

10/21/2024

to

10/21/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Bangladesh Dhaka Stock Exchange Broad Index GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 28, 2013 to Oct 21, 2026

Model Insight

With persistence 0.997, volatility shocks have a half-life of 248 trading days (~1.0 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 9.22 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

High persistence: persistence 0.997, shock half-life ~248 daysv = 9.22 · fat tails
ParamValuet-stat
ωlong-run2.2889
2.15**
αscore0.1686
13.99***
βpersistence0.9972
818.72***
νDF9.2156
2.33**

0.997

Persistence

248d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

long-run

Long-run variance given a price move

2.2889
2.15**
α

score

Weight on the scaled score

0.1686
13.99***
β

persistence

Volatility persistence

0.9972
818.72***
ν

DF

Student-t tail thickness

9.2156
2.33**

Persistence:

0.997

Half-life:

248 days