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V-Lab

Philippines Stock Exchange PSEi Index GAS-GARCH Student T Volatility Analysis

Volatility prediction for Friday, August 28th, 2026

1 Day

20.16%

increased by 3.07%

1 Week

20.26%

increased by 3.17%

1 Month

20.58%

increased by 3.49%

Analysis last updated: Friday, August 28, 2026 at 08:13 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Philippines Stock Exchange PSEi Index GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Aug 20, 2026

Model Insight

Volatility shocks decay with a half-life of 22 trading days, meaning a shock loses half its impact after approximately 22 days. Returns follow a Student-t distribution with v = 6.12 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.8768
13.68***
α

ARCH

Response to squared shocks

0.0976
34.73***
β

GARCH

Volatility persistence

0.9690
497.93***
ν

DF

Student-t tail thickness

6.1152
8.19***

Persistence:

0.969

Half-life:

22 days