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Egyenes-e a tőkepiaci árazási modell (CAPM) karakterisztikus és értékpapír-piaci egyenese?
[Is CAPMs characteristic, security-market line a straight one?]

  • Ormos, Mihály


  • Erdős, Péter
  • Zibriczky, Dávid

Tanulmányunk egyrészt arra a kérdésre keresi a választ, vajon helytálló-e a tőkepiaci árazási modell (CAPM) azon feltevése, hogy a piaci kockázat mérőszáma, a béta és a várható hozam között lineáris kapcsolat áll fenn. Másrészt nem tudjuk, hogy megalapozott-e a kockázati mérőszám meghatározásához tett linearitási feltétel. Ha a karakterisztikus egyenesek linearitása sérül, akkor új kockázati mértékek levezetésére van szükség. Vizsgálatainkat a Standard & Poors nagy-, közép- és kisvállalati részvényindex-komponensekből vett, 150 részvényből álló véletlen mintán végezzük el. Az amerikai részvények karakterisztikus egyeneseinek linearitása minden szokásos szignifikanciaszinten elvethető, ezért szemiparametrikus kockázati mértékeket vezetünk le. Írásunkban megmutatjuk, hogy ha a karakterisztikus egyenes linearitása sérül, akkor a tőkepiaci árazási modell bétaja átlagosan szignifikánsan alulbecsli az értékpapír kockázatát, ezért a standard piaci kockázati mérték nem használható. Eredményeink alapján megfogalmazhatjuk azt az állítást, hogy a piacot csak extrém körülmények között lehet megverni. Journal of Economic Literature (JEL) kód: C14, C51, G12, G32.

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Article provided by Közgazdasági Szemle Alapítvány (Economic Review Foundation) in its journal Közgazdasági Szemle (Economic Review - monthly of the Hungarian Academy of Sciences).

Volume (Year): LVII (2010)
Issue (Month): 3 ()
Pages: 201-221

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Handle: RePEc:ksa:szemle:1153
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Order Information: Postal: Közgazdasági Szemle Alapítvány (Economic Review Foundation) Budapest, Budaörsi út 45., 1112, Hungary
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  1. Elton, Edwin J & Gruber, Martin J & Blake, Christopher R, 1996. "Survivorship Bias and Mutual Fund Performance," Review of Financial Studies, Society for Financial Studies, vol. 9(4), pages 1097-1120.
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  7. Fama, Eugene F & French, Kenneth R, 1996. " Multifactor Explanations of Asset Pricing Anomalies," Journal of Finance, American Finance Association, vol. 51(1), pages 55-84, March.
  8. Basu, Sanjoy, 1983. "The relationship between earnings' yield, market value and return for NYSE common stocks : Further evidence," Journal of Financial Economics, Elsevier, vol. 12(1), pages 129-156, June.
  9. Stapleton, R C & Subrahmanyam, M G, 1983. " The Market Model and Capital Asset Pricing Theory: A Note," Journal of Finance, American Finance Association, vol. 38(5), pages 1637-42, December.
  10. Richard Blundell & Alan Duncan, 1998. "Kernel Regression in Empirical Microeconomics," Journal of Human Resources, University of Wisconsin Press, vol. 33(1), pages 62-87.
  11. Michael C. Jensen, 1968. "The Performance Of Mutual Funds In The Period 1945–1964," Journal of Finance, American Finance Association, vol. 23(2), pages 389-416, 05.
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