Northern, WI 05/21/2013 (gdpwatch) - The share prices of Amtech Systems Inc. (NASDAQ:ASYS) had been continually rising following the company’s announcement of the present quarter results. The share prices declined by 2.98% and currently trading at $4.37. The trading volume of Amtech Systems Inc. (NASDAQ:ASYS) during the session had more than tripled its average trading volume […]