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ProShares Big Data Refiners ETFDAT | NYSE | 一般ETF

ProShares Big Data Refiners ETF seeks results, before fees and expenses, that track the performance of the FactSet Big Data Refiners Index (the "index"). The fund invests in financial instruments that ProShare Advisors believes, in combination, should track the performance of the index. The index consists of companies that provide analytics and infrastructure for managing and extracting information from large data sets. The fund will invest in all of the component securities of the index in approximately the same proportion as the index. The fund is non-diversified.