ETF Specialist

Untangling How Index Providers Break the Market Down by Size

Adam McCullough, CFA

A version of this article appeared in the November 2017 issue of Morningstar ETFInvestor. Download a complimentary copy of ETFInvestor here

Index providers take different approaches to partitioning the U.S. equity market by size. S&P Dow Jones Indices divvies up market size segments by rank ordering stocks by market capitalization and assigning a fixed number of stocks to its large- (S&P 500), mid- (S&P MidCap 400), and small-cap (S&P SmallCap 600) size segments.

Adam McCullough, CFA has a position in the following securities mentioned above: VB VO VTI. Find out about Morningstar's editorial policies.