Currency Shares.com - 9 Non leveraged currency shares operated by Rydex Investments. Invesco Power Shares - Broad range of leveraged etfs including regular us dollar up/down units. IPath ETN - Broad range of etns including currency notes on the euro, british pound, and japanese yen. Proshares - A large selection of ets including 2x Euro and Yen currency up/down units. Macro Markets - Housing Market Index trust 3x leverage on 10 u.s. cities with currency units in the works. Market Vectors ETN - Double Long + Double Short Euro, also regular Chinese Renminbi and Indian Rupee.