Corning Incorporated (NYSE:GLW) has earned an “A-” credit rating from Morningstar. The research firm’s “A-” rating indicates that the company is a low default risk. They also gave their stock a three star rating. Shares of Corning (NYSE:GLW) opened at 18.28 on Friday. The stock’s 50 day moving average price is $18.38 and its 200-day […]