The investment seeks daily investment results that correspond to the inverse (-1x) of the daily performance of the S&P MidCap400®.
The fund invests in derivatives that ProShare Advisors believes, in combination, should have similar daily return characteristics as the inverse (-1x) of the daily return of the index. The index is a measure of mid-size company U.S. stock market performance. It is a float-adjusted, market capitalization-weighted index of 400 U.S. operating companies and real estate investment trusts selected through a mechanical process. The fund is non-diversified.
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 http://www.globalfunddata.com/funds/new/performance/fund_administrator?variant=J. P. Morgan Chase Bank, N.A.
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