In this paper, an efficient model is developed to price European options in the presence of proportional transaction costs, basing the pricing model of Davis.

• 本文在基于效用的期权定价法(utility based option pricing model)基础上,建立了一个基于双曲绝对风险厌恶效用函数(hyperbolic absolute risk aversion,简记为HARA)、并引入交易成本的欧式期权定价模型。