Introducing Variety in Risk Management

Fabrizio Lillo, Rosario Mantegna, Jean-Philippe Bouchaud and Marc Potters ()

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Abstract: We review the recently introduced concept of variety of a financial portfolio and we sketch its importance for risk control purposes. The empirical behaviour of variety, correlation, exceedance correlation and asymmetry of the probability density function of daily returns is discussed. The results obtained are compared with the ones of a one-factor model showing strengths and limitations of this model.

Date: 2001-07
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Working Paper: Introducing Variety in Risk Management (2001)
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