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Pricing And Hedging Index Options With A Dominant Constituent Stock, Helen Cheyne
Pricing And Hedging Index Options With A Dominant Constituent Stock, Helen Cheyne
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In this paper, we examine the pricing and hedging of an index option where one constituents stock plays an overly dominant role in the index. Under a Geometric Brownian Motion assumption we compare the distribution of the relative value of the index if the dominant stock is modeled separately from the rest of the index, or not. The former is equivalent to the relative index value being distributed as the sum of two lognormal random variables and the latter is distributed as a single lognormal random variable. Since these are not equal in distribution, we compare the two models. The …