Visa (NYSE:V) and MasterCard (NYSE:MA) have consistently been winners – until now. Taking many by surprise, both Visa and MasterCard's stock is down in 2014.

In this episode of The Motley Fool's Where the Money Is, Motley Fool financial analysts David Hanson and Tyler Riggs discuss what they consider to be the biggest catalysts for this pause in Visa and MasterCard's otherwise consistently positive performances. For now, it's not a question of the fundamentals of these businesses. So what's threatening them?