A novel method to analyze the impact of transaction costs on a dynamically optimized portfolio is developed. Transaction costs, when taken into account in an incomplete market, generate a liquidity premium which is large enough to address important economic questions, such as the size of the...

We investigate the optimal investment problem when the interest rate is stochastic and the investor must pay proportional transaction costs when buying and selling the risky assets. We first consider a portfolio of bonds and transaction costs.We then add a stock to the portfolio, and analyze the...