shares of canadian bus manufacturer nfi group inc tumbled in early trading monday after the company said supply chain troubles will weigh on its thirdquarter results and production into the fourth quarter at 938 am et the shares were trading nearly 15 lower at c991 nfi said it has had trouble completing and delivering contractually committed buses in the period as its suppliers have not consistently supplied it with the proper components to complete vehicles demand remains strong the company said but it will immediately halt all new vehicle starts for two production weeks to give its suppliers time to deliver the critical components the company said it expects a thirdquarter adjusted loss before interest taxes depreciation and amortization of between 15 million and 17 million according to factset analysts were expecting a loss of 84 million for the fourth quarter adjusted ebitda guidance has been changed to a range of between a loss of 40 million and 60 million