IUSV provides classic exposure to the US equity market value space. The fund draws its selection universe from the S&P 900, which combines the S&P 500 and S&P 400. IUSV picks value stocks based on the following ratios: book value, earnings and sales-to-price. Securities are weighted using the same value metrics. Instead of replicating the index, the fund uses representative sampling indexing. The index is rebalanced on a quarterly basis. Note: Prior to January 23, 2017 IUSV tracked the Russell 3000 Value Index.