 ValuEngine lowered shares of Insignia Systems NASDAQ:ISIG from a hold rating to a sell rating in a research note published on Thursday, ValuEngine reports. Shares of NASDAQ:ISIG opened at 1.75 on Thursday. The stock has a market capitalization of 21.36 million, a price-to-earnings ratio of -3.43 and a beta of 0.51. The company has a ... 