Business, Markets Stocks upgraded: Owens Corning (NYSE:OC), Applied Optoelectronics, Inc. (NASDAQ:AAOI), KB Financial Group Inc. (NYSE:KB), Arch Capital Group Ltd. (NASDAQ:ACGL) Posted onJune 28, 2019June 28, 2019 Investment analysts at the Seaport Global Securities equities division upgraded shares of Owens Corning (NYSE:OC) from a Sell to a Neutral. Owens Corning (NYSE:OC), a Industrial Goods …