iShares Core S&P Mid-Cap ETF (ISHARES TRUST CORE S&P MID-CAP ) ETF

The index measures the performance of the mid-capitalization sector of the U.S. equity market, as determined by SPDJI. The fund generally will invest at least 80% of its assets in the component securities of its index and may invest up to 20% of its assets in certain futures, options and swap contracts, cash and cash equivalents.