Investors interested in stocks from the Aerospace - Defense sector have probably already heard of General Dynamics (GD) and Northrop Grumman (NOC) . But which of these two companies is the best option for those looking for undervalued stocks? 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 Zacks Rank favors stocks wi ...