Introducing shrinkage in heavy-tailed state space models to predict equity excess returns
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| Format: | Preprint |
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2018
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| _version_ | 1866913679713239040 |
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| author | Huber, Florian Kastner, Gregor Pfarrhofer, Michael |
| author_facet | Huber, Florian Kastner, Gregor Pfarrhofer, Michael |
| contents | We forecast S&P 500 excess returns using a flexible Bayesian econometric state space model with non-Gaussian features at several levels. More precisely, we control for overparameterization via novel global-local shrinkage priors on the state innovation variances as well as the time-invariant part of the state space model. The shrinkage priors are complemented by heavy tailed state innovations that cater for potential large breaks in the latent states. Moreover, we allow for leptokurtic stochastic volatility in the observation equation. The empirical findings indicate that several variants of the proposed approach outperform typical competitors frequently used in the literature, both in terms of point and density forecasts. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_1805_12217 |
| institution | arXiv |
| publishDate | 2018 |
| record_format | arxiv |
| spellingShingle | Introducing shrinkage in heavy-tailed state space models to predict equity excess returns Huber, Florian Kastner, Gregor Pfarrhofer, Michael Econometrics Statistical Finance Applications We forecast S&P 500 excess returns using a flexible Bayesian econometric state space model with non-Gaussian features at several levels. More precisely, we control for overparameterization via novel global-local shrinkage priors on the state innovation variances as well as the time-invariant part of the state space model. The shrinkage priors are complemented by heavy tailed state innovations that cater for potential large breaks in the latent states. Moreover, we allow for leptokurtic stochastic volatility in the observation equation. The empirical findings indicate that several variants of the proposed approach outperform typical competitors frequently used in the literature, both in terms of point and density forecasts. |
| title | Introducing shrinkage in heavy-tailed state space models to predict equity excess returns |
| topic | Econometrics Statistical Finance Applications |
| url | https://arxiv.org/abs/1805.12217 |