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V-Lab

State Street SPDR Portfolio Aggregate Bond ETF MF2-GARCH Volatility Analysis

Volatility prediction for Monday, September 14th, 2026

1 Day

4.50%

decreased by 0.20%

1 Week

4.50%

decreased by 0.20%

1 Month

4.42%

decreased by 0.28%

Analysis last updated: Friday, September 11, 2026 at 11:54 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of State Street SPDR Portfolio Aggregate Bond ETF MF2-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

May 30, 2007 to Sep 11, 2026

Model Insight

This asset exhibits a notable leverage effect: negative returns increase next-day volatility 77% more than equivalent positive returns.

σ

MF2-GARCH Model

Tap to view equation

Leverage: Negative returns increase volatility 77% more than positive returns
ParamValuet-stat
mwindow126
αARCH0.0553
3.73***
βGARCH0.8929
58.09***
γleverage0.0426
2.19**
λ₁tau intercept0.0110
2.19**
λ₂forecast adj.0.8646
17.02***
λ₃tau persistence0.0000
0.00

0.970

Persistence

22d

Half-life
σ

MF2-GARCH Model

Tap to view equation

ParameterValuet-statistic
m

window

Rolling window length

126
α

ARCH

Response to squared shocks

0.0553
3.73***
β

GARCH

Volatility persistence

0.8929
58.09***
γ

leverage

Additional response to negative shocks

0.0426
2.19**
λ₁

tau intercept

Baseline long-term coefficient

0.0110
2.19**
λ₂

forecast adj.

Forecast performance sensitivity

0.8646
17.02***
λ₃

tau persistence

Long-term factor persistence

0.0000
0.00

Persistence:

0.970

Half-life:

22 days