Shares of AmpliTech Group, Inc. (OTCMKTS:AMPG – Get Rating) were down 4.7% during trading on Tuesday . The company traded as low as $3.22 and last traded at $3.25. Approximately 102,244 shares changed hands during trading, an increase of 73% from the average daily volume of 59,129 shares. The stock had previously closed at $3.41. […]