Applying Grey Forecasting Model on the Investment Performance of Markowitz Efficiency Frontier: A Case of the Taiwan Securities Markets

This paper uses a grey forecasting model GM (1, 1) on improving the investment performance of classical Markowitz efficiency frontier's investment portfolio using component securities of the Taiwan 50 Index from 1997 to 2005 as the samples. Using grey Markowitz efficiency frontier's investment portfolio models, we establish a more stable and correct connection between ex-ante model and ex-post performance. The results show the Grey Markowitz efficiency frontier investment portfolio model could improve the investment performance effectively and stably.