ProShares Short MidCap400 (MYY) is an exchange-traded fund in the Trading Inverse Equity category. It has $2.90M in assets, an expense ratio of 0.95% and a 4.40% dividend yield. The fund invests in financial instruments that the advisor believes, in combination, should produce daily returns consistent with the Daily Target. The index is a measure of mid-size company U.S. stock market performance. It is a market capitalization-weighted index of 400 U.S. operating companies and real estate investment trusts selected through a process that factors in criteria such as liquidity, price, market capitalization, financial viability and public float. It is non-diversified.