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V-Lab

Diana Tea Co Ltd Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Monday, July 27th, 2026

1 Day

38.05%

decreased by 0.03%

1 Week

41.82%

increased by 3.74%

1 Month

47.93%

increased by 9.85%

Analysis last updated: Sunday, July 26, 2026 at 01:15 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Diana Tea Co Ltd S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Sep 4, 2008 to Jul 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 5 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.0506
11.19***
α

ARCH

Response to squared shocks

0.1744
6.11***
β

GARCH

Volatility persistence

0.6916
16.00***
γi Spline Coefficients
K=1
γ10.0001
0.25

Persistence:

0.866

Half-life:

5 days