Investment Analysts’ upgrades for Friday, May 20th: Advance Auto Parts (NYSE:AAP) was upgraded by analysts at StockNews.com from a hold rating to a buy rating. Ambev (NYSE:ABEV) was upgraded by analysts at StockNews.com from a hold rating to a buy rating. Banco de Chile (NYSE:BCH) was upgraded by analysts at Banco Santander, S.A. to a […]