Is it convenient to talk at the moment? 20 mg nolvadex Financial data firm Markit said its "flash," or preliminary,U.S. Manufacturing Purchasing Managers Index fell to 51.1, thelowest since October 2012, from 52.8 in September. The surveywas conducted partly during a 16-day U.S. government shutdownthat economists expect will slow overall U.S. growth slightly inthe last three months of 2013.