About Rydex Inverse 2x S&P Select Sector Energy - Answers.com
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Exchange-traded fund - Information from Answers.com
Most ETFs track an index, such as the S&P 500 or MSCI EAFE. .... Advisors introduced the "Sector Spiders", which follow the nine sectors of the S&P 500. ... Some index ETFs, known as leveraged ETFs or inverse ETFs, use investments in ... In 2005, Rydex Investments launched the first ever currency ETF called the Euro ...
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