JPMorgan and Bank of America are exploring buying a debit network to dodge fee caps

JPMorgan Chase, Bank of America, Wells Fargo, and PNC Financial Services have held early talks about buying one of Fiserv's debit networks, STAR or Accel. Owning the network instead of routing through an outside one could let the banks sidestep a federal cap on debit card fees. Fiserv's stock jumped more than 4 percent in premarket trading the day the talks became public.

The law they are trying to get around

The Durbin Amendment, part of the 2010 Dodd-Frank Act, caps the debit card interchange fees that banks holding $10 billion or more in assets can charge merchants, but only when a transaction routes over an outside network. A bank that owns the network itself is not boxed in by that cap the same way. That is the entire logic of the talks: buy the pipe, not just use it.

This has already happened once

Capital One ran this exact play at a much bigger scale. Its $50.6 billion acquisition of Discover Financial Services put Capital One in control of its own payments network, letting it sit closer to the transaction and rely less on outside processors. Capital One's stock moved more than 4 percent on the new Fiserv talks too, more than any of the four banks actually named in them.

Nobody is close to signing anything

Why a build studio cares

This is a story about who controls the pipe a transaction has to travel through, and how much leverage that gives you over everyone downstream. It is the same question we think about whenever we wire payments into a product for a client: whose rails is this actually running on, and what happens to the fee or the access if that changes. A bank buying a debit network is a bigger version of a decision every checkout flow makes on a smaller scale.

Next step: read the PYMNTS writeup for the clearest breakdown of the Durbin Amendment mechanics, or Investing.com's coverage for how the market reacted. The original reporting is behind a paywall at the Wall Street Journal.