Amgen, Inc. (NASDAQ:AMGN) has received an “A” credit rating from analysts at Morningstar. The research firm’s “A” rating suggests that the company is a low default risk. They also gave their stock a four star rating. Shares of Amgen (NASDAQ:AMGN) traded down 2.53% during trading on Thursday, reaching $156.46. The company had a trading volume […]