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Bangladesh Dhaka Stock Exchange Broad Index Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Monday, September 28th, 2026

1 Day

14.42%

increased by 0.06%

1 Week

15.00%

increased by 0.64%

1 Month

16.84%

increased by 2.48%

Analysis last updated: Monday, September 28, 2026 at 05:40 PM UTC

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graph of Bangladesh Dhaka Stock Exchange Broad Index S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 28, 2013 to Sep 24, 2026

Model Insight

This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 30 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

Time-varying baseline: volatility reverts to a slowly-shifting spline trend
ParamValuet-stat
ωconst1.2376
4.86***
αARCH0.1916
10.26***
βGARCH0.7857
46.68***
∑γi Spline Coefficients
K=7
γ1-0.3826
-2.06**
γ20.6425
2.08**
γ3-0.4021
-1.41
γ40.3246
1.18
γ5-0.6566
-2.35**
γ61.1485
4.52***
γ7-0.9992
-5.89***

0.977

Persistence

30d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.2376
4.86***
α

ARCH

Response to squared shocks

0.1916
10.26***
β

GARCH

Volatility persistence

0.7857
46.68***
∑γi Spline Coefficients
K=7
γ1-0.3826
-2.06**
γ20.6425
2.08**
γ3-0.4021
-1.41
γ40.3246
1.18
γ5-0.6566
-2.35**
γ61.1485
4.52***
γ7-0.9992
-5.89***

Persistence:

0.977

Half-life:

30 days