 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.
<clarity>  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.
 Recently, many studies have shown the usefulness of minimal spanning trees (MST) network whose metric distance is de?ned by using correlation coe?cients have strong implications on extracting infor- mation from return time series.