StockNews.com upgraded shares of Compañía de Minas Buenaventura S.A.A. (NYSE:BVN – Free Report) from a sell rating to a hold rating in a research report sent to investors on Wednesday morning. A number of other research firms have also issued reports on BVN. Morgan Stanley lowered Compañía de Minas Buenaventura S.A.A. from an overweight rating […]