Obayashi Corp Spline-GARCH Volatility Analysis
Volatility prediction for Thursday, July 16th, 2026
1 Day
30.57%
increased by 0.45%
1 Week
32.00%
increased by 1.88%
1 Month
34.94%
increased by 4.82%
Analysis last updated: Thursday, July 16, 2026 at 07:26 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 3, 1990 to Jul 10, 2026Model 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 7 trading days.
τ
Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.0777 | 7.28*** |
α ARCH Response to squared shocks | 0.1426 | 9.36*** |
β GARCH Volatility persistence | 0.7594 | 37.17*** |
Spline Coefficients
K=9
| γ1 | -0.0221 | -0.65 |
| γ2 | 0.0995 | 2.06** |
| γ3 | -0.1854 | -6.54*** |
| γ4 | 0.1925 | 6.94*** |
| γ5 | -0.1421 | -4.70*** |
| γ6 | 0.0863 | 2.82*** |
| γ7 | -0.0414 | -1.19 |
| γ8 | 0.0367 | 0.71 |
| γ9 | -0.0259 | -0.26 |
Persistence:
0.902
Half-life:
7 days
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