Investors interested in stocks from the Utility - Electric Power sector have probably already heard of Pampa Energia (PAM) and Pinnacle West (PNW) . But which of these two stocks presents investors with the better value opportunity right now? 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 proven Zacks Rank emphasizes companies with ...