Stock's Stunning Activities - Aastrom Biosciences Inc (NASDAQ:ASTM), Golden Star Resources Ltd. (USA) (NYSEMKT:GSS), Mast Therapeutics Inc (NYSEMKT:MSTX), Rexahn Pharmaceuticals, Inc. (NYSEMKT:RNN)

Charleston, SC -- (SBWIRE) -- 10/04/2013 -- ImpressivePennyStocks.com covers several stocks on the NASDAQ and New York Stock Exchange that technically qualify as penny stocks, we typically find ones that are on the OTC Market. ImpressivePennyStocks.com issues a special report on the following stocks: Aastrom Biosciences Inc (NASDAQ:ASTM), Golden Star Resources Ltd. (USA) (NYSEMKT:GSS), Mast Therapeutics Inc (NYSEMKT:MSTX), Rexahn Pharmaceuticals, Inc. (NYSEMKT:RNN).