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- W2010389005 abstract "This paper examines a wide variety of models that allow for complex and discontinuous periodic variation in conditional volatility. The value of these models (including augmented versions of existing models) is demonstrated with an application to high frequency commodity futures return data. Their use is necessary, in this context, because commodity futures returns exhibit discontinuous intraday and interday periodicities in conditional volatility. The former of these effects is well documented for various asset returns; however, the latter is unique amongst commodity futures returns, where contract delivery and climate are driving forces. Using six years of high-frequency cocoa futures data, the results show that these characteristics of conditional return volatility are most adequately captured by a spline-version of the periodic generalized autoregressive conditional heteroscedastic (PGARCH) model. This model also provides superior forecasts of future return volatility that are robust to variation in the loss function assumed by the user, and are shown to be beneficial to users of Value-at-Risk (VaR) models." @default.
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- W2010389005 date "2004-01-01" @default.
- W2010389005 modified "2023-09-30" @default.
- W2010389005 title "Modeling discontinuous periodic conditional volatility: Evidence from the commodity futures market" @default.
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- W2010389005 doi "https://doi.org/10.1002/fut.20114" @default.
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