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V-Lab

Diana Tea Co Ltd MF2-GARCH Volatility Analysis

Volatility prediction for Monday, July 27th, 2026

1 Day

36.40%

decreased by 0.24%

1 Week

39.88%

increased by 3.24%

1 Month

43.33%

increased by 6.69%

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

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of Diana Tea Co Ltd MF2-GARCH

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 asset shows a rare inverse leverage effect: positive returns raise next-day volatility 85% more than negative returns. Volatility rises more after gains than after losses, the reverse of the usual leverage effect and uncommon among risky assets.

σ

MF2-GARCH Model

Tap to view equation

ParameterValuet-statistic
m

window

Rolling window length

26
α

ARCH

Response to squared shocks

0.2327
21.90***
β

GARCH

Volatility persistence

0.4728
13.21***
γ

leverage

Additional response to negative shocks

-0.1068
-7.44***
λ₁

tau intercept

Baseline long-term coefficient

2.2271
0.55
λ₂

forecast adj.

Forecast performance sensitivity

0.2443
0.55
λ₃

tau persistence

Long-term factor persistence

0.5358
0.63

Persistence:

0.652

Half-life:

2 days