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{name} Model Equation

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Parameter	Value	t-statistic
ω const Unconditional variance weight	0.0245	20.35***
α ARCH Response to squared shocks	0.0007	0.24
β GARCH Volatility persistence	0.8892	387.43***
γ leverage Additional response to negative shocks	0.1815	27.63***

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State Street SPDR S&P 500 ETF Trust GJR-GARCH Volatility Analysis

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News Impact Curve

Volatility Forecast

Parameter Estimates

Other State Street SPDR S&P 500 ETF Trust Analyses