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Large dynamic covariance matrices: enhancements based on intraday data
De Nard, Gianluca; Engle, Robert F.; Ledoit, Olivier; … - 2021 - This version: June 2021
unconditional correlation matrix. In this paper, we show how performance can be increased further by using open/high/low/close (OHLC … but also of dynamic correlations, is the concept of a regularized return, obtained from a volatility proxy in conjunction …
Persistent link: https://www.econbiz.de/10012584099
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Large dynamic covariance matrices: enhancements based on intraday data
De Nard, Gianluca; Engle, Robert F.; Ledoit, Olivier; … - 2020
. (2019) is able to overcome this curse via nonlinear shrinkage estimation of the unconditional correlation matrix. In this … covariances, is the concept of a regularized return, obtained from a volatility proxy in conjunction with a smoothed sign …
Persistent link: https://www.econbiz.de/10012253083
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Large dynamic covariance matrices : enhancements based on intraday data
De Nard, Gianluca; Engle, Robert F.; Ledoit, Olivier; … - In: Journal of banking & finance 138 (2022), pp. 1-16
Persistent link: https://www.econbiz.de/10013461761
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Large dynamic covariance matrices
Engle, Robert F.; Ledoit, Olivier; Wolf, Michael - 2016
for conditional heteroskedasticity; a favored model is Dynamic Conditional Correlation (DCC), derived from the ARCH … eigenvalues; a favored model is nonlinear shrinkage, derived from Random Matrix Theory (RMT). The present paper aims to marry …
Persistent link: https://www.econbiz.de/10011518597
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Markowitz portfolios under transaction costs
Ledoit, Olivier; Wolf, Michael - 2022
Markowitz portfolio selection is a cornerstone in finance, both in academia and in the industry. Most academic studies either ignore transaction costs or account for them in a way that is both unrealistic and suboptimal by (i) assuming transaction costs to be constant across stocks and (ii)...
Persistent link: https://www.econbiz.de/10013440073
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Using, taming or avoiding the factor zoo? : a double-shrinkage estimator for covariance matrices
De Nard, Gianluca; Zhao, Zhao - In: Journal of empirical finance 72 (2023), pp. 23-35
Persistent link: https://www.econbiz.de/10014476795
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Forecasting conditional covariance matrices in high-dimensional time series : a general dynamic factor approach
Trucíos, Carlos; Mazzeu, João H. G.; Hallin, Marc; … - In: Journal of business & economic statistics : JBES ; a … 41 (2023) 1, pp. 40-52
Persistent link: https://www.econbiz.de/10013540629
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Realized Wishart-GARCH : a score-driven multi-asset volatility model
Gorgi, P.; Hansen, Peter Reinhard; Janus, Paweł; … - In: Journal of financial econometrics 17 (2019) 1, pp. 1-32
Persistent link: https://www.econbiz.de/10012054424
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Factor models for portfolio selection in large dimensions : the good, the better and the ugly
De Nard, Gianluca; Ledoit, Olivier; Wolf, Michael - In: Journal of financial econometrics 19 (2021) 2, pp. 236-257
Persistent link: https://www.econbiz.de/10012620051
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Managing portfolio risk during crisis times : a dynamic conditional correlation perspective
Zhang, Hanyu; Dufour, Alfonso - In: The quarterly review of economics and finance 94 (2024), pp. 241-251
Persistent link: https://www.econbiz.de/10014494675