As of August 1, 2017, ETF Managers Trust - PureFunds ISE Big Data ETF has gone out of business. ETF Managers Trust - PureFunds ISE Big Data ETF is an exchange traded fund launched and managed by ETF Managers Group LLC. It invests in public equity markets across the globe. The fund invests in stocks of companies operating in the big data and analytics industry, including those companies that develop applications and/or provide solutions that facilitate the management and analysis of very large data sets or those that provide services as an originator and/or aggregator of such data sets for analysis purposes. It invests in stocks of companies across all market capitalizations with a minimum market capitalization of $75 million. The fund seeks to replicate the performance of the ISE Big Data Index, by investing in stocks of companies as per their weightings in the index. It was formerly known as FactorShares Trust - PureFunds ISE Big Data ETF. ETF Managers Trust - PureFunds ISE Big Data ETF was formed on July 15, 2015 and is domiciled in the United States.