Skip to main content
V-Lab

Dow Jones Industrial Average Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Wednesday, July 8th, 2026

1 Day

11.69%

decreased by 0.40%

1 Week

12.03%

decreased by 0.06%

1 Month

13.09%

increased by 1.00%

Analysis last updated: Wednesday, July 8, 2026 at 12:03 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Dow Jones Industrial Average S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Jul 2, 2026

Model Insight

This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 22 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.4608
7.03***
α

ARCH

Response to squared shocks

0.1025
9.72***
β

GARCH

Volatility persistence

0.8659
73.53***
γi Spline Coefficients
K=6
γ10.0729
5.58***
γ2-0.1138
-5.41***
γ30.0619
4.00***
γ4-0.0343
-2.50**
γ50.0288
1.93*
γ6-0.0232
-2.06**

Persistence:

0.968

Half-life:

22 days