title: Alternate entropy measure for assessing volatility in financial markets.
abstract: We propose two alternate information theoretical approaches to assess non-Gaussian fluctuations in the return dynamics of financial markets. Specifically, we use superinformation, which is a measure of the disorder of the entropy of time series. We argue on theoretical grounds on its usefulness and show that it can be applied effectively for analyzing returns. A study of stock market data for over five years has been carried out using this approach. We show how superinformation helps to identify and classify important signals in the time series. The financial crisis of 2008 comes out very clearly in the superinformation plots. In addition, we introduce the super mutual information. Distinct super mutual information signatures are observed that might be used to mitigate idiosyncratic risk. The universality of our approach has been tested by carrying out the analysis for the 100 stocks listed in S&P100 index. The average superinformation values for the S&P100 stocks correlates very well with the VIX.
authors.affiliation: Department of Electrical Engineering, IIT Delhi, Hauz Khas, New Delhi, India.
authors.forename: Ranjan
authors.initials: R
authors.lastname: Bose
authors.forename: Kay
authors.initials: K
authors.lastname: Hamacher
mesh_terms: D003198:Computer Simulation; D003627:Data Interpretation, Statistical; D019277:Entropy; D040541:Marketing / Q000379:methods*; D018803:Models, Economic; D015233:Models, Statistical