NEW YORK, April 4, 2011 /PRNewswire/ -- OTC Markets Group Inc. (OTCQX: OTCM), the financial information and technology services company that provides the world's largest electronic marketplace for broker-dealers to trade unlisted stocks, today announced that Riverstone Resources Inc. (TSX.V: RVS; OTCQX: RVREF), a company focused on gold exploration in West Africa, is now trading on the OTC market's highest tier, OTCQX®.

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Riverstone Resources began trading today on the OTC market's prestigious tier, OTCQX International. Investors can find current financial disclosure and Real-Time Level 2 quotes for the Company on www.otcqx.com and www.otcmarkets.com.

"The superior information and visibility of the OTCQX marketplace allows companies to efficiently build investor confidence and expand their shareholder base," said R. Cromwell Coulson, President and Chief Executive Officer of OTC Markets Group. "We are pleased to welcome Riverstone Resources to OTCQX."

Berns & Berns, Counsellors at Law will serve as Riverstone's Principal American Liaison ("PAL") on OTCQX, responsible for providing guidance on OTCQX requirements.

About Riverstone Resources Inc.

Riverstone Resources Inc. (TSX.V: RVS; OTCQX: RVREF) trades in the United States on OTCQX under the symbol "RVREF". Riverstone Resources Inc. is active in gold exploration in Burkina Faso, West Africa, where the company holds an extensive portfolio of six high quality exploration projects covering 2,300 square kilometres. For further information about the company and its activities, please refer to the company's website at www.riverstoneresources.com.

About OTC Markets Group Inc.

OTC Markets Group Inc. (OTCQX: OTCM) operates the world's largest electronic marketplace for broker-dealers to trade unlisted stocks. Our OTC Link™ platform supports an open network of competing broker-dealers that provide investors with the best prices in over 10,000 OTC securities. In 2010, securities on OTC Link traded over $144 billion in dollar volume, making it the third largest U.S. equity trading venue after NASDAQ and the New York Stock Exchange. We categorize the wide spectrum of OTC-traded companies into three tiers - OTCQX (the quality-controlled marketplace for investor friendly companies), OTCQB® (the U.S. reporting company marketplace for development stage companies), and OTC Pink™ (the speculative trading marketplace) - so investors can identify the level and quality of information companies provide. To learn more about how OTC Markets Group makes the unlisted markets more transparent, informed, and efficient, visit www.otcmarkets.com.

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SOURCE OTC Markets Group Inc.