$苹果(AAPL)$ $标普500指数ETF-SPDR(SPY)$ $纳斯达克100指数ETF-PowerShares(QQQ)$ $纳斯达克指数ETF-ProShares三倍做空(SQQQ)$ $纳斯达克指数ETF-ProShares三倍做多(TQQQ)$ $标普500指数ETF-ProShares三倍做空(SPXU)$ $标普500指数ETF-ProShares三倍做多(UPRO)$
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