Barak, Sasan; Abessi, Masoud; Modarres, Mohammad - In: European Journal of Operational Research 228 (2013) 1, pp. 141-147
One concern of many investors is to own the assets which can be liquidated easily. Thus, in this paper, we incorporate portfolio liquidity in our proposed model. Liquidity is measured by an index called turnover rate. Since the return of an asset is uncertain, we present it as a trapezoidal...