The paper is very short. He basically applies principles outlined in the first two papers cited to the market over the last year. "Some distance properties of

The paper is very short. He basically applies principles outlined in the first two papers cited to the market over the last year. "Some distance properties of latent root and vector methods used in multivariate analysis" http://biomet.oxfordjournals.org/cgi/content/abstract/53/3-4/325 http://biomet.oxfordjournals.org/cgi/content/abstract/53/3-4... "Hierarchical StructureinFinancial Markets" http://arxiv.org/pdf/cond-mat/9802256 http://arxiv.org/pdf/cond-mat/9802256 The first is behind a journal wall, but if you're at a university you should probably have access. The second is free for everyone! Yay.