1 6 Se p 20 00 Self - organized critical topology of stock markets
نویسندگان
چکیده
We have analyzed the cross-correlations of daily fluctuations for N = 6 358 US stock prices during the year 1999. From those N (N −1)/2 correlations coefficients, the Minimum Spanning Tree (MST) has been built. We have investigated the topology exhibited by the MST. Eventhough the average topological number is n ≈ 2, the variance σ of the topological distribution f (n) diverges! More precisely, we have found that f (n) ∼ n −2.2 holding over two decades. We have studied the topological correlations for neighbouring nodes: an extremely broad set of local configurations exists, confirming the divergence of σ.
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