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V-Lab

Exponent Inc Asy. Power MEM Volatility Analysis

Volatility prediction for Thursday, August 20th, 2026

1 Day

31.43%

increased by 0.52%

1 Week

32.03%

increased by 1.12%

1 Month

34.23%

increased by 3.32%

Analysis last updated: Wednesday, August 19, 2026 at 09:23 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Exponent Inc APMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Aug 17, 1990 to Aug 14, 2026

Model Insight

With persistence 0.993, volatility shocks have a half-life of 106 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 17% more than positive returns

μ

APMEM Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1158
13.66***
α

ARCH

Response to squared shocks

0.1294
42.84***
β

GARCH

Volatility persistence

0.8578
332.35***
γ

leverage

Additional response to negative shocks

0.0362
4.60***
δ

power

Transformation power

2.1209
42.06***

Persistence:

0.993

Half-life:

106 days