Skip to main content
V-Lab
V-Lab

Calamos S&P 500 Stru ETF JAN GJR-GARCH Volatility Analysis

Volatility prediction for Wednesday, September 30th, 2026

1 Day

1.85%

decreased by 0.06%

1 Week

1.95%

increased by 0.04%

1 Month

2.27%

increased by 0.36%

Analysis last updated: Tuesday, September 29, 2026 at 09:40 PM UTC

Press Delete or Backspace to remove this series.
Date Range:

from

to

6M ·

1Y ·

All

graph of Calamos S&P 500 Stru ETF JAN GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 2025 to Sep 25, 2026

Model Insight

Volatility shocks decay with a half-life of 52 trading days, meaning a shock loses half its impact after approximately 52 days.

σ

GJR-GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 52-day half-life
ParamValuet-stat
ωconst0.0009
0.99
αARCH0.0000
0.00
βGARCH0.8721
17.53***
γleverage0.2293
1.59

0.987

Persistence

52d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0009
0.99
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.8721
17.53***
γ

leverage

Additional response to negative shocks

0.2293
1.59

Persistence:

0.987

Half-life:

52 days