Identifying Business Sectors from Stock Price Fluctuations

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dc.creatorGopikrishnan, Parameswaran
dc.creatorRosenow, Bernd
dc.creatorPlerou, Vasiliki
dc.creatorStanley, H. Eugene
dc.date2000-11-08
dc.date.accessioned2026-07-07T12:06:29Z
dc.date.available2026-07-07T12:06:29Z
dc.descriptionFirms having similar business activities are correlated. We analyze two different cross-correlation matrices C constructed from (i) 30-min price fluctuations of 1000 US stocks for the 2-year period 1994-95 and (ii) 1-day price fluctuations of 422 US stocks for the 35-year period 1962-96. We find that the eigenvectors of C corresponding to the largest eigenvalues allow us to partition the set of all stocks into distinct subsets. These subsets are similar to conventionally-identified business sectors, and are stable for extended periods of time. Using a set of coupled stochastic differential equations, we argue how correlations between stocks might arise. Finally, we demonstrate that the sectors we identify are useful for the practical goal of finding an investment which earns a given return without exposure to unnecessary risk.
dc.description4 pages 2-column format revtex, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0011145
dc.identifierhttp://arxiv.org/abs/cond-mat/0011145
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/208669
dc.subjectStatistical Mechanics
dc.subjectDisordered Systems and Neural Networks
dc.subjectStatistical Finance
dc.titleIdentifying Business Sectors from Stock Price Fluctuations
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