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V-Lab

S&P 500 Index GAS-GARCH Student T Volatility Analysis

Volatility prediction for Tuesday, April 21st, 2026

1 Day

16.83%

decreased by 1.04%

1 Week

16.86%

decreased by 1.01%

1 Month

16.99%

decreased by 0.88%

Analysis last updated: Tuesday, April 21, 2026 at 12:20 AM UTC

Date Range:

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to

6M ·

1Y ·

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graph of S&P 500 Index GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time