Investors interested in stocks from the Utility - Electric Power sector have probably already heard of NorthWestern (NWE) and Pinnacle West (PNW) . But which of these two stocks offers value investors a better bang for their buck right now? We'll need to 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 emp ...