Investors interested in Financial Transaction Services stocks are likely familiar with Shift4 Payments (FOUR) and Visa (V) . 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 puts an emphasis on earnings estimates and estimat ...