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The relationship of capitalization period length with market portfolio composition and betas

Author

Listed:
  • Jordi Esteve Comas
  • Didac Ramirez Sarrio

    (Universitat de Barcelona)

Abstract

Beta coefficients are not stable if we modify the observation periods of the returns. The market portfolio composition also varies, whereas changes in the betas are the same, whether they are calculated as regression coefficients or as a ratio of the risk premiums. The instantaneous beta, obtained when the capitalization frequency approaches infinity, may be a useful tool in portfolio selection.

Suggested Citation

  • Jordi Esteve Comas & Didac Ramirez Sarrio, 2007. "The relationship of capitalization period length with market portfolio composition and betas," Working Papers in Economics 176, Universitat de Barcelona. Espai de Recerca en Economia.
  • Handle: RePEc:bar:bedcje:2007176
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    More about this item

    JEL classification:

    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions

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