Replication strategies of derivatives under proportional transaction costs - An extension to the Boyle and Vorst model
When we introduce transaction costs the perfect Black and Scholes hedge, consisting of the underlying stock and a risk free asset, becomes infinitely expensive. By loosening the pure arbitrage argument and only considering the expected transaction costs, one can find an upper bound on the price of an option. In this essay this is done by using a framework presented by Leland (1985) and Boyle and V
