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Positive Portfolio Factors
Stephen J. Brown NYU Stern School of Business William N. Goetzmann Yale School of Management - International Center for Finance; National Bureau of Economic Research (NBER) Mark Grinblatt University of California, Los Angeles - Finance Area; Yale University - International Center for Finance; National Bureau of Economic Research (NBER) January 9, 1997 Yale School of Management Working Paper No. F-57 Abstract: We use an iterative relocation algorithm to identify factors in common stock returns. The benefit of the approach is that factors are portfolios of assets with non-negative weights. As a result, they are readily interpretable in terms of the characteristics of the underlying securities. The positive portfolio factors have comparatively high explanatory power in sample and out of sample. We find evidence of a size factor and factors identified with certain industries. Factors extracted from the mutual fund universe perform marginally better than factors from the universe of equities.
JEL Classifications: G1 Working Paper SeriesDate posted: April 23, 1998 ; Last revised: April 24, 2008Suggested CitationContact Information
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