Capital One Financial Corporation plans to acquire Discover Financial Services in a $35 billion deal that would combine two of the largest U.S. credit card companies. Today on the show, five big questions about the deal, and the opaque system behind every swipe, tap or insertion of your credit card.

Related:
Planet Money's TikTok on the secret behind credit card rewards

For sponsor-free episodes of The Indicator from Planet Money, subscribe to Planet Money+ via Apple Podcasts or at plus.npr.org.

Music by Drop Electric. Find us: TikTok, Instagram, Facebook, Newsletter.