Estimation of the conditional variance-covariance matrix of returns using the intraday range
AbstractThis paper proposes a hybrid multivariate exponentially weighted moving average (EWMA) estimator of the variance-covariance matrix of returns. The proposed estimator employs a range-based EWMA specification to estimate the conditional variances of returns, and a standard return-based EWMA specification to estimate the correlation between each pair of returns. The hybrid EWMA estimator offers an improvement over the standard EWMA estimator, both statistically and economically. Moreover, the hybrid EWMA estimator is less sensitive to the choice of decay factor.
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Bibliographic InfoArticle provided by Elsevier in its journal International Journal of Forecasting.
Volume (Year): 26 (2010)
Issue (Month): 1 (January)
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Web page: http://www.elsevier.com/locate/ijforecast
Conditional variance-covariance matrix of returns Exponentially weighted moving average (EWMA) Intraday range;
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