Most of the previous researches about portfolio analysis focus on short-selling. In fact, no short-selling is also important because short-selling is not allowed in stock markets of some coun-tries. This paper gives t...Most of the previous researches about portfolio analysis focus on short-selling. In fact, no short-selling is also important because short-selling is not allowed in stock markets of some coun-tries. This paper gives the suffcient and necessary conditions and proposes an optimal algorithm for Markowitz's mean-variance models and Sharpe's ratio with no short-selling. The optimal algorithm makes it easier to obtain the effcient frontiers with no short-selling.展开更多
基金the National Natural Science Foundation of China (Grant Nos. 10501005, 10701021)Northeast Normal University (Grant No. NENU-STC07001)
文摘Most of the previous researches about portfolio analysis focus on short-selling. In fact, no short-selling is also important because short-selling is not allowed in stock markets of some coun-tries. This paper gives the suffcient and necessary conditions and proposes an optimal algorithm for Markowitz's mean-variance models and Sharpe's ratio with no short-selling. The optimal algorithm makes it easier to obtain the effcient frontiers with no short-selling.
