Search for: [Abstrakt = "In this paper a network structure of the Polish Stock Market \(PSM\), one of the emerging markets, is studied. The conceptions\: Minimum Spanning Tree \(MST\) and Weighted Random Graph \(WRG\), constructed among companies listed on this stock exchange, are compared. In these models every vertex is a stock and the weight assigned to each edge in WRG is the cross\-correlation coefficient. The Influence\-Strength \(IS\) is defined at every vertex in both models\: in WRG as the sum of the weights on the edges upon that vertex, in MST as the vertex degree. The IS distribution follows a power law with exponent r = 1.6 in WRG and 5 = 2.2 in MST. The both results show that there must be a few stocks whose price fluctuations can powerfully influence the price dynamics of other stocks in the same market. In both cases these are the same companies."]
