Undercutting Three Cents Is Not a BusinessWide moat

A challenger's usual opening move is to be cheaper. Against Visa that move is close to meaningless. The network's own take is about twenty-nine basis points of payments volume¹, so eliminating it entirely saves a merchant less than a third of one percent — while interchange, which is most of what the merchant actually pays, stays exactly where it is unless the issuer changes too.

This is why serious competitive attempts do not aim at the network's price. They aim at the whole structure: a rail with no interchange at all, which requires either a regulator or a party willing to fund consumer adoption directly out of its own pocket for years.

The corollary is that Visa's pricing is defended by its own modesty, which is a genuinely unusual position. Most incumbents are vulnerable because their price creates the incentive to displace them. Visa's price is small enough that the return on displacing it does not justify the capital, and large enough — across $13.9 trillion — to build one of the most profitable companies in the world.

That defence has one precise failure mode, and it is the subject of the danger below.