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Analysis of the sensitivity to discrete dividends : A new approach for pricing vanillas

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Author Info

  • Arnaud Gocsei

    ()
    (Societe Generale - Société Générale)

  • Fouad Sahel

    ()
    (Societe Generale - Société Générale)

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    Abstract

    The incorporation of a dividend yield in the classical option pricing model of Black- Scholes results in a minor modification of the Black-Scholes formula, since the lognormal dynamic of the underlying asset is preserved. However, market makers prefer to work with cash dividends with fixed value instead of a dividend yield. Since there is no closed-form solution for the price of a European Call in this case, many methods have been proposed in the literature to approximate it. Here, we present a new approach. We derive an exact analytic formula for the sensitivity to dividends of an European option. We use this result to elaborate a proxy which possesses the same Taylor expansion around 0 with respect to the dividends as the exact price. The obtained approximation is very fast to compute (the same complexity than the usual Black-Scholes formula) and numerical tests show the extreme accuracy of the method for all practical cases.

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    Bibliographic Info

    Paper provided by HAL in its series Working Papers with number hal-00511012.

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    Date of creation: 05 May 2010
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    Handle: RePEc:hal:wpaper:hal-00511012

    Note: View the original document on HAL open archive server: http://hal.archives-ouvertes.fr/hal-00511012/en/
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    Web page: http://hal.archives-ouvertes.fr/

    Related research

    Keywords: Equity options; discrete dividends;

    This paper has been announced in the following NEP Reports:

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