%0 Journal Article %T Risk Curve and Bifuzzy Portfolio Selection %A Limei Yan %J Journal of Mathematics Research %D 2009 %I %R 10.5539/jmr.v1n2p193 %X In order to solve the portfolio problem when security returns are bifuzzy variables, firstly we propose a new definition of risk, then one type of portfolio selection based on expected value and risk is provided according to bifuzzy theory. Furthermore, a hybrid intelligent algorithm by integrating bifuzzy simulation and genetic algorithm is designed. Finally, one numerical experiment is provided to illustrate effectiveness of the hybrid intelligent algorithm. %U http://www.ccsenet.org/journal/index.php/jmr/article/view/3791