5. A limitation in the implementation of the mean-variance model for portfolio optimization is that one of

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5. A limitation in the implementation of the mean-variance model for portfolio optimization is that one of the critical inputs in the model, the sample covariance matrix, is subject to considerable estimation risk. This can skew the optimizer towards suggesting extreme weights for some of the stocks in the portfolio and lead to poor performance.

Explain what approaches can be used to deal with the problem.

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Equity Valuation And Portfolio Management

ISBN: 9780470929919

1st Edition

Authors: Frank J. Fabozzi, Harry M. Markowitz

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