Shares of Amarantus BioSciences Inc. (OTC: AMBS), a development-stage biotechnology company, are soaring in trading today. At last check, AMBS shares were trading 17.34% higher at $0.128 on above average volume of 30.59 million. The stock hit an intra-day high of $0.13 today. AMBS shares have gained more than 99% in the last three trading sessions.