Template-Type: ReDIF-Paper 1.0 Author-Name: Luc Bauwens Author-Name-First: Luc Author-Name-Last: Bawens Author-Email: luc.bauwens@uclouvain.be Author-Workplace-Name: Universite CĂ´te d'Azur, SKEMA, France. Author-Name: Manuela Braione Author-Name-First: Manuela Author-Name-Last: Braione Author-Email: manuela.braione@uclouvain.be Author-Workplace-Name: Universite Catholique de Louvain,CORE, B-1348 Louvain-La-Neuve, Belgium. Author-Name: Giuseppe Storti Author-Name-First: Giuseppe Author-Name-Last: Storti Author-Email: storti@unisa.it Author-Workplace-Name: Dipartimento di Scienze Economiche e Statistiche (DISES), UniversitĂ  degli Studi di Salerno Title: A Dynamic Component Model for Forecasting High-Dimensional Realized Covariances Matrices Abstract: The Multiplicative MIDAS Realized DCC (MMReDCC) model simultaneously accounts for short and long term dynamics in the conditional (co)volatilities of asset returns, in line with the empirical evidence suggesting that their level is changing over time as a function of economic conditions. Herein the applicability of the model is improved along two directions. First, by proposing an algorithm that relies on the maximization of an iteratively re-computed moment-based pro_le likelihood function and keeps estimation feasible in large dimensions by mitigating the incidental parameter problem. Second, by illustrating a conditional bootstrap procedure to generate multi-step ahead predictions from the model. In an empirical application on a dataset of forty-six equities, the MMReDCC model is found to statistically outperform the selected benchmarks in terms of in-sample _t as well as in terms of out-of-sample covariance predictions. The latter are mostly significant in periods of high market volatility. Length: 31 pages Creation-Date:2020-07 Revision-Date:2020-07 Publication-Status: Published in Working Papers, September 2016, pages 1-31. File-URL:https://www.dises.unisa.it/RePEc/sep/wpaper/3_234.pdf File-Format:Application/pdf File-Function:First version, 2016 Number:3_234 Classification-JEL: Keywords: Realized covariance, dynamic component models, multi-step forecasting, iterative algorithm Handle:RePEc:sep:wpaper:3_234