Author(s)

Li-Ching Ma^*

Department of Information Management, National United University, Miaoli City.

Decision makers’ choices are often influenced by visual background information. This study uses open-ended equity funds in Taiwan to investigate three well-known optimal portfolio models, including the mean-variance, maximin, and minimization of mean absolute deviation. The optimal portfolios are then visualized on Decision Balls to assist investors in making investment decisions. By observing the Decision Balls, investors can see the optimal portfolios, compare the optimal weights provided by the different models, view the cluster of funds, and even find substitute funds if preferred funds are not available.

Visualization, Decision Ball, Investment decision, Portfolio

Ma, L. (2011) Visualizing Investment Decision on Decision Balls. American Journal of Operations Research, 1, 57-64. doi: 10.4236/ajor.2011.12009.