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V-Lab

Stewart Information Services Corp Asy. Power MEM Volatility Analysis

Volatility prediction for Wednesday, July 22nd, 2026

1 Day

31.13%

decreased by 1.12%

1 Week

31.42%

decreased by 0.83%

1 Month

32.50%

increased by 0.25%

Analysis last updated: Tuesday, July 21, 2026 at 09:54 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Stewart Information Services Corp APMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 3, 1990 to Jul 17, 2026

Model Insight

With persistence 0.991, volatility shocks have a half-life of 77 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 28% more than positive returns

μ

APMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0653
19.02***
α

ARCH

Response to squared shocks

0.1332
48.57***
β

GARCH

Volatility persistence

0.8616
364.64***
γ

leverage

Additional response to negative shocks

0.0645
9.75***
δ

power

Transformation power

1.9076
46.31***

Persistence:

0.991

Half-life:

77 days