Tabak, Benjamin M.; Serra, Thiago R.; Cajueiro, Daniel O. - In: Physica A: Statistical Mechanics and its Applications 389 (2010) 16, pp. 3240-3249
This paper investigates the topological properties of the Brazilian stock market networks. We build the minimum spanning tree, which is based on the concept of ultrametricity, using the correlation matrix for a variety of stocks of different sectors. Our results suggest that stocks tend to...