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You may also want to check out the work of Jesse Blocher in finance at UNC: http://sites.google.com/site/jablocher/.
I've seen him present some compelling research on systemic risk in financial networks based on fund ownership of equities. He basically creates a bipartite network of funds to equities and then examines how redemptions/losses in one fund impact performance elsewhere, among many other interesting questions. Worth a read.
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