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V-Lab

Micron Technology Inc GJR-GARCH Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

69.12%

decreased by 0.75%

1 Week

69.00%

decreased by 0.87%

1 Month

68.56%

decreased by 1.31%

Analysis last updated: Friday, September 18, 2026 at 10:40 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Micron Technology Inc GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 1, 1990 to Sep 18, 2026

Model Insight

With persistence 0.993, volatility shocks have a half-life of 99 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 116% more than positive returns

σ

GJR-GARCH Model

Tap to view equation

High persistence: persistence 0.993, shock half-life ~99 daysLeverage: Negative returns increase volatility 116% more than positive returns
ParamValuet-stat
ωconst0.1002
4.09***
αARCH0.0240
4.45***
βGARCH0.9551
205.84***
γleverage0.0279
2.31**

0.993

Persistence

99d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1002
4.09***
α

ARCH

Response to squared shocks

0.0240
4.45***
β

GARCH

Volatility persistence

0.9551
205.84***
γ

leverage

Additional response to negative shocks

0.0279
2.31**

Persistence:

0.993

Half-life:

99 days