# Fundamental Theorem of Asset Pricing under fixed and proportional transaction costs

@article{Brown2019FundamentalTO, title={Fundamental Theorem of Asset Pricing under fixed and proportional transaction costs}, author={Martin Brown and Tomasz Zastawniak}, journal={Annals of Finance}, year={2019}, volume={16}, pages={423-433} }

We show that the absence of arbitrage in a model with both fixed and proportional transaction costs is equivalent to the existence of a family of absolutely continuous single-step probability measures, together with an adapted process with values within the bid-ask intervals that satisfies the martingale property with respect to each of the measures. This extends Harrison and Pliska’s classical Fundamental Theorem of Asset Pricing to the case of combined fixed and proportional transaction costs…

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