Abstract
It is shown how results presented in Insurance: Mathematics and Economics 11, no. 4, in several papers by De Schepper, Goovaerts, Delbaen and Kaas, concerning the arithmetic average of the exponential of Brownian motion with drift [which plays an essential role in Asian options, and has also been studied by the author, jointly with H. Geman] are related to computations about winding numbers of planar Brownian motion. Furthermore, in the present paper, Brownian excursion theory is being used in an essential way, and helps to clarify the role of some Bessel functions computations in several formulae.
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Yor, M. (2001). From Planar Brownian Windings to Asian Options. In: Exponential Functionals of Brownian Motion and Related Processes. Springer Finance. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-56634-9_8
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DOI: https://doi.org/10.1007/978-3-642-56634-9_8
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