V-Lab
3Y US Treasury CMT 3 Year GAS-GARCH Student T Volatility Analysis
Volatility prediction for Thursday, September 24th, 2026
1 Day
22.19%
1 Week
22.22%
1 Month
22.33%
Analysis last updated: Thursday, September 24, 2026 at 03:00 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Sep 18, 2026Model Insight
With persistence 0.998, volatility shocks have a half-life of 323 trading days (~1.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 6.52 degrees of freedom, capturing fatter tails than a normal distribution.
GAS-GARCH-T Model
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| Param | Value | t-stat |
|---|---|---|
| ωconst | 3.0724 | 2.41** |
| αARCH | 0.0518 | 16.54*** |
| βGARCH | 0.9979 | 1,070.66*** |
| νDF | 6.5195 | 5.21*** |
0.998
Persistence323d
Half-lifeGAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 3.0724 | 2.41** |
α ARCH Response to squared shocks | 0.0518 | 16.54*** |
β GARCH Volatility persistence | 0.9979 | 1,070.66*** |
ν DF Student-t tail thickness | 6.5195 | 5.21*** |
Persistence:
0.998
Half-life:
323 days
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