The fund is an exchange traded fund (ETF) that aims to track the performance of the S&P SmallCap 600 Index as closely as possible. The ETF invests in physical index securities. The S&P SmallCap 600 Index offers exposure to 600 small cap US stocks which comply with S&P's size, liquidity, and free float criteria. The index is weighted by free float market capitalisation. iShares ETFs are funds managed by BlackRock. They are transparent, cost-efficient, liquid vehicles that trade on stock exchanges like normal securities. iShares ETFs offer flexible and easy access to a wide range of markets and asset classes.