Visa and MasterCard are far-and-away the leaders in the credit card space when it comes to global payment volume. Although it has a different business model which includes extending credit to customers, American Express could present a substantial threat if it wanted to. In this segment of The Motley Fool's everything-financials show, Where the Money Is, analysts Matt Koppenheffer and David Hanson ponder a scenario of American Express changing its business to directly attack Visa and MasterCard.

David Hanson owns shares of American Express. Matt Koppenheffer has no position in any stocks mentioned. The Motley Fool recommends American Express, MasterCard, and Visa. The Motley Fool owns shares of MasterCard and Visa. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.