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V-Lab

Calamos S&P 500 ST AL PR ETF GJR-GARCH Volatility Analysis

Volatility prediction for Wednesday, August 26th, 2026

1 Day

1.30%

decreased by 0.02%

1 Week

1.35%

increased by 0.03%

1 Month

1.49%

increased by 0.17%

Analysis last updated: Wednesday, August 26, 2026 at 02:18 AM UTC

Date Range:

from

to

6M ·

1Y ·

All

graph of Calamos S&P 500 ST AL PR ETF GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Apr 1, 2025 to Aug 21, 2026

Model Insight

Volatility shocks decay with a half-life of 13 trading days, meaning a shock loses half its impact after approximately 13 days.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0006
4.16***
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.8884
78.40***
γ

leverage

Additional response to negative shocks

0.1155
2.73***

Persistence:

0.946

Half-life:

13 days