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V-Lab

Global X S&P 500 Christin VL GJR-GARCH Volatility Analysis

Volatility prediction for Tuesday, July 21st, 2026

1 Day

13.11%

decreased by 0.25%

1 Week

13.26%

decreased by 0.10%

1 Month

13.52%

increased by 0.16%

Analysis last updated: Monday, July 20, 2026 at 09:27 PM UTC

Date Range:

from

to

6M ·

All

graph of Global X S&P 500 Christin VL GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Sep 24, 2025 to Jul 17, 2026

Model Insight

Volatility shocks decay with a half-life of 5 trading days, meaning a shock loses half its impact after approximately 5 days.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1047
2.35**
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.8083
12.97***
γ

leverage

Additional response to negative shocks

0.1027
3.42***

Persistence:

0.860

Half-life:

5 days