RT Journal Article SR Electronic T1 U.S. Style Benchmarks JF ETFs and Indexing FD Institutional Investor Journals SP 10 OP 14 VO 2004 IS 1 A1 John Tucker A1 Patricia Sanchez-Marin YR 2004 UL http://guides.pm-research.com/content/2004/1/10.abstract AB There are a number of different style index families. Although each family offers similarly labeled products, there are many differences in the indices. This article focuses on S&P, Frank Russell, and Dow Jones, exploring the differences every investor should understand before making an investment decision.