“…Then the explicit integral representation of early exercise premium and the American fractional lookback option factorization formula are also given. Based on some researches of lookback options pricing and early exercise premium in the literature (Feng and Linetsky, 2009;Kim et al, 2011;Leung, 2013;Park and Kim, 2013;Fuh and Luo, 2013;Eberlein and Papapantoleon, 2005;Lai and Lim, 2004), to achieve quick and accurate pricing for practical purposes, this paper adopts the critical exercise price to valuing the American fractional lookback options, and numerical simulation illustrates some notable features of the American fractional lookback options.…”