Correlation, Hierarchies, and Networks in Financial Markets
By Michele Tumminello, Fabrizio Lillo, Rosario Nunzio Mantegna. 2008
396 citations recorded by the source corpus.
We discuss some methods to quantitatively investigate the properties of correlation matrices. Correlation matrices play an important role in portfolio optimization and in several other quantitative descriptions of asset price dynamics in financial markets. Specifically, we discuss how to define and obtain hierarchical trees, correlation based trees and networks from a correlation matrix. The hierarchical clustering and other procedures performed on the correlation matrix to detect statistically reliable aspects of it are seen as filtering procedures of the correlation matrix. We also discuss a method to associate a hierarchically nested factor model to a hierarchical tree obtained from a correlation matrix. The information retained in filtering procedures and its stability with respect to statistical fluctuations is quantified by using the Kullback-Leibler distance.
Subfields: Economics and Econometrics, Finance, Statistical and Nonlinear Physics
View Paper: https://www.semanticscholar.org/paper/3368a5a2e677a2f6fe5f00058f9d282780413ccf
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Citations in the corpus
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