Jefferies on Wednesday launched the TR/J CRB Wildcatters Exploration & Production ETF, an exchange-traded fund that tracks the Thomson Reuters/Jefferies CRB Wildcatters Energy E&P Equity Index and trades on NYSE Arca.

The index is comprised of small- and mid-cap oil and gas exploration and production companies and also provides a benchmark for the equities of commodity-related companies. These companies, Jefferies said, are largely underrepresented in major stock market and energy sector indexes. Approximately two-thirds of the proved reserves of the Wildcatters Index are natural gas.

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