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arXiv 1802.01307q-fin.PRq-fin.CPq-fin.MF
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基于正交多项式的亚式期权定价

Asian Option Pricing with Orthogonal Polynomials

Sander Willems

摘要:

本文在Black-Scholes背景下,给出了连续抽样算术亚式期权价格的一个级数展开式。该扩展是基于相对于对数正态分布正交的多项式。级数中的所有项都是完全显式的,不涉及数值积分或任何特殊函数。我们提供了充分的条件,以保证收敛的级数。对数正态分布的矩不确定性在序列中引入了渐近偏差,但是我们用数值方法证明了在实践中可以安全地忽略该偏差。

英文摘要:

In this paper we derive a series expansion for the price of a continuously sampled arithmetic Asian option in the Black-Scholes setting. The expansion is based on polynomials that are orthogonal with respect to the log-normal distribution. All terms in the series are fully explicit and no numerical integration nor any special functions are involved. We provide sufficient conditions to guarantee convergence of the series. The moment indeterminacy of the log-normal distribution introduces an asymptotic bias in the series, however we show numerically that the bias can safely be ignored in practice.

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