The Dimensional US Adjusted Market 1 Index was compiled by Dimensional from CRSP and Compustat data. The index includes all securities of US companies traded on the NYSE, NYSE MKT (formerly AMEX), and Nasdaq Global Market with an emphasis on companies with smaller capitalization, lower relative price, and higher profitability. Profitability is measured as operating income before depreciation and amortization minus interest expense scaled by book. Exclusions: non-US companies, REITs, UITs, and investment companies. The index was incepted on March 1, 2007, and is rebalanced annually.