Investors interested in Aerospace - Defense stocks are likely familiar with Leidos (LDOS) 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.Everyone has their own methods for finding great value opportunities, but our model includes pairing an impressive grade in the Value category of our Style Scores system with a strong Zacks Rank. The Zacks Rank is a proven strategy that targets companies with positive earni ...