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In this article, the authors measure the impact of estimation error on latent factor model forecasts of portfolio risk … find that an estimation period of 250 days may be adequate to accurately forecast risk and factor exposures for an equally … an estimation period of 1000 days. This underscores the importance of testing risk models on optimized portfolios …
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This paper proposes novel approaches to the modeling of attenuation bias effects in volatility forecasting. Our strategy relies on suitable generalizations of the Realized GARCH model by Hansen et al. (2012) where the impact of lagged realized measures on the current conditional variance is...
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