(1)原油相关ETF: $原油指数ETF-ProShares DJ-UBS两倍做多(UCO)$ $VelocityShares 3x Long Crude Oil ETN(UWTI)$$原油指数ETF-ProSharesDJ-UBS两倍做空(SCO)$ $VelocityShares 3x Inverse Crude Oil ETN(DWTI)$ (2)黄金相关ETF: $黄金...