Analysts’ upgrades for Saturday, August 26th: Ambac Financial Group (NYSE:AMBC) was upgraded by analysts at StockNews.com from a sell rating to a hold rating. Barclays (NYSE:BCS) was upgraded by analysts at StockNews.com from a hold rating to a buy rating. First Busey (NASDAQ:BUSE) was upgraded by analysts at StockNews.com from a sell rating to a […]