The company's stock is down 5% this year. China unveiled two stealth-fighter prototypes in December. Little is known about them, but some worry they could outmatch the F-35, a fifth-generation ...
Photo:Xinhua Stock of US arms firm Lockheed Martin, maker of the fifth-generation fighter jet F-35, was downgraded to Hold from Buy at Deutsche Bank with a price target of $523, down from $611.