EDZ provides inverse exposure to the widely followed MSCI Emerging Markets Index, leveraged by a factor of three. The underlying index strongly represents financial and technology firms in emerging markets, particularly concentrated in China, South Korea, and Taiwan. EDZ is to some extent a bet against those sectors and those markets. EDZ is designed to provide 3x inverse exposure to the index for one day, not for an extended period. In fact, investors interested in EDZ should look long and hard at the prospectus to get a complete understanding of the path-dependent nature of its returns. Investors who use it for longer than a day could get results that differ greatly from -300%. Also, consider that EDZ is designed to be a short-term trading vehicle, not a long-term investment, so trading costs have a bigger impact than the expense ratio.