Shares of Fiat Chrysler halted on Thursday after the United States Environmental Protection Agency accused the automaker of using software that allowed excess diesel emissions in about 104,000 vehicles. US-listed shares of Fiat Chrysler plunged more than 18 percent Thursday after Reuters first reported the news. Fiat shares halted after the EPA announced its accusation. The EPA alleged the automaker violated the Clean Air Act for installing and failing to disclose "engine management software in light-duty model year 2014, 2015 and 2016 Jeep Grand Cherokees and Dodge Ram 1500 trucks with 3.0 liter diesel engines sold ... (full story)