Before revision:  Recently, many studies indicated that the minimum spanning tree (MST) network whose metric distance is de?ned by using correlation coe?cients have strong implications on extracting infor- mation from return time series. However in many cases researchers may hope to investigate the strength of interactions but not the directions of them. In order to study the strength of interaction and connection of ?nancial asset returns we propose a modi?ed minimum spanning tree network whose metric distance is de?ned from absolute cross-correlation coe?cients.
After revision:  Recently, many studies indicated that the minimum spanning tree (MST) in extracting interactions between financial entities. Here, we propose a modi?ed minimum spanning tree network whose metric distance is de?ned from absolute cross-correlation coe?cients.