Top AMEX Gainer (NBS, MEET, VRNG, GSS, GSX)

Neostem Inc. (AMEX:NBS) shares declined 9.65% to $0.723 in the morning hour. The 52 week trading range for the company is $0.30 - $0.96. The shares of the company have gained 8% in the last one year. The company is a international biopharmaceutical company with global research and development capabilities and operations in three business units: U.S. adult stem cells, China adult stem cells and China pharmaceuticals, primarily antibiotics.

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MeetMe Inc (AMEX:MEET) stock soared 17.62% to $2.27. The company will host a conference call on Wednesday, August 8, 2012 at 4:30 p.m. ET to discuss details and answer questions about the company's second quarter of fiscal year 2012 financial results ended June 30, 2012. Analysts are expecting the company to report revenue of 11.52 million.

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Golden Star Resources Ltd. (USA) (AMEX:GSS) stock surged 10.04% to $1.30. On July 25, 2012, the company provided an update on exploration activities at its Wassa mine in Ghana. Complete drill results, plans and sections. The exploration drilling at Wassa Main continued to intersect wider zones of over 2 g/t gold mineralization along strike and down dip.

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Vringo, Inc. (AMEX:VRNG) shares climbed 16.03% to $3.60 in the early hour. AOL Inc. today agreed to settle part of a patent dispute brought by video-ringtone company Vringo, giving the start-up another potential win in its ongoing lawsuit against some of the biggest names in the technology sector. Details of the settlement were confidential and Vringo declined to comment.

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Gasco Energy Inc (AMEX:GSX) shares gained 3.60% to $0.115. The company last week announced financial and operating results for the second quarter ended June 30, 2012. The company posted a second quarter net loss of $5.2 million, or $0.03 per share, as compared to breakeven results of $0.0 million, or $0.00 per share in the year ago period. The average realized oil price for second quarter was $78.57 per barrel, as compared to $88.80 per barrel for the prior-year period.