Investors with an interest in Aerospace - Defense stocks have likely encountered both Northrop Grumman (NOC) and Lockheed Martin (LMT) . But which of these two stocks presents investors with the better value opportunity right now? Let's take a closer look. There are plenty of strategies for discovering value stocks, but we have found that pairing a strong Zacks Rank with an impressive grade in the Value category of our Style Scores system produces the best returns. The proven Zacks Rank emphasizes companies ...