United States Commodity Funds (USCF), a US-based pioneer in commodity-focused ETFs, has announced the launch of the United States Metals Index Fund (USMI), an NYSE-listed ETF providing optimised exposure to a diversified portfolio of metals futures contracts. USMI is designed to track the price movements of the SummerHaven Dynamic Metals Index Total Return and is the twelfth ETF in the USCF range, which has some $2.7bn in assets under management.