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QQQQ, SPDRs and
DIA Trading Systems to trade the Rydex Velocity 100, the
Rydex Venture 100, the Rydex Titan 500, the Rydex
Tempest 500, UltraBull ProFund, UltraBear ProFund, Ultra
OTC ProFund, Ultra DOW ProFund and other Rydex and ProFund bullish and
bearish funds.
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