Analysts’ upgrades for Thursday, April 21st: AMC Networks (NASDAQ:AMCX) was upgraded by analysts at StockNews.com from a hold rating to a buy rating. Alpha and Omega Semiconductor (NASDAQ:AOSL) was upgraded by analysts at StockNews.com from a hold rating to a buy rating. American Public Education (NASDAQ:APEI) was upgraded by analysts at StockNews.com from a hold […]