Reports that large banks are exploring an acquisition of Fiserv’s STAR debit network have focused primarily on why the banks might want the asset. In this analysis, Larry Pruss, Managing Director of Emerging Payment Technologies at SRM, examines the equally important question of why Fiserv might be willing to sell. One possible explanation is that Fiserv sees greater long-term value in digital money infrastructure than in owning a mature debit network and could use a sale to redirect capital toward initiatives such as FIUSD, stablecoin interoperability, and the exploration of tokenized deposits. Fiserv has not publicly connected those investments to a potential network sale, so that rationale should be viewed as a strategic interpretation rather than a confirmed use of proceeds. The banks, meanwhile, may value the network for different reasons, including greater control over debit routing, stronger network economics, and reduced dependence on third-party payment networks.

For credit unions, the more important question is what a potential transaction signals about where core providers are investing, whether those investments will strengthen cooperative financial institutions, and how credit unions should position themselves for the next generation of payments infrastructure.

Why are big banks trying to buy Fiserv’s debit network?

Before getting into the details, it is worth noting that reports have variously described the discussions involving either STAR alone or Fiserv’s broader debit network business, potentially including Accel. No transaction has been announced, and the discussions appear to remain preliminary.

Owning a debit network could allow participating banks to capture network revenue, reduce reliance on third-party networks, exercise greater control over routing and product economics, and potentially facilitate more transactions that remain within a bank-controlled environment. Capital One set a prominent precedent when it agreed in 2024 to acquire Discover Financial in an approximately $35.3 billion all-stock transaction, completed in May 2025. The acquisition gave Capital One control of Discover’s payment network as well as its issuing and banking businesses.

Reports have also suggested that the banks are exploring whether a proprietary structure could mitigate some effects of the Durbin interchange cap. Whether such a structure would lawfully avoid or materially alter the cap would depend on its design and regulatory treatment.

Why would Fiserv sell a strategic asset like its debit network?

One possible strategic rationale is that Fiserv could monetize a mature network asset and redeploy capital toward higher growth infrastructure, including digital assets. The company has already begun investing in that direction.  In June 2025, Fiserv announced FIUSD, a financial institution focused stablecoin and digital asset platform expected to use infrastructure from Paxos and Circle and to be made available through Solana. In June 2026, then CEO Mike Lyons said at the Bernstein Strategic Decisions Conference that FIUSD was scheduled to go live in July. Fiserv has since established a public FIUSD product presence, although the company has not publicly disclosed extensive operating metrics or details regarding initial production deployments.

Fiserv has not publicly stated that FIUSD or tokenized deposit investments are driving consideration of a network sale. The connection should therefore be treated as a strategic interpretation, not as a confirmed use of proceeds.

If Fiserv’s management believes future revenue will come from tokenized deposits, programmable settlement, and blockchain-based payments, selling a legacy network asset at a premium and reinvesting in next-generation infrastructure is a logical move.  Both buyers and sellers could be acting rationally. The banks could acquire a network asset that strengthens their current debit economics, while Fiserv could reallocate capital toward capabilities that it believes will define the next generation of financial infrastructure.

What is the Durbin Amendment, and does it affect credit unions?

The Durbin Amendment, part of the 2010 Dodd-Frank Act, caps the interchange fee that debit card issuers with $10 billion or more in assets can charge merchants at about 21 cents plus 0.05% of the transaction, with an additional one-cent fraud-prevention adjustment available to eligible issuers. Congress built in a small-issuer exemption for everyone below that asset threshold. Most credit unions fall well under $10 billion and already collect a higher, uncapped interchange rate than large banks do. A change in who owns Fiserv’s network does not touch that exemption.  A change in network ownership would not, by itself, eliminate the small issuer’s exemption. The direct statutory effect on credit union interchange would therefore be limited. The commercial effect could be more significant if ownership changes network pricing, access, routing incentives, operating rules, or competition among debit networks.

Could Fiserv selling its debit network hurt credit unions that use Fiserv as their core?

It depends on where the sale proceeds go. A William Blair research note warned that “by aiding large banks, Fiserv could alienate its community bank and credit union customer base, beneficiaries of Durbin debit regulations.” That concern is real. But there is another possibility. If Fiserv reinvests the sale proceeds into tokenized deposits, stablecoin infrastructure, and shared-ledger capabilities that benefit its credit union clients, the sale could accelerate the platform improvements credit unions have been waiting for. Fiserv serves roughly a quarter of all credit unions as their core provider. Credit unions should track whether those reinvestments ultimately benefit their institutions and members or primarily serve as the largest banks.

What is a shared ledger, and has anyone actually tested one for banking?

A shared ledger is an infrastructure through which multiple authorized institutions record, coordinate, and settle transactions against a common or synchronized state. Participating institutions generally continue to maintain their own internal books, but the shared platform can reduce reconciliation between separately maintained transaction records. The Bank for International Settlements calls its version a Unified Ledger: central bank money, commercial bank deposits, and other assets combined on one programmable platform. The BIS argues that this removes the manual reconciliation and messaging that today’s separate-ledger system requires. Large banks have already tested this. In 2023, the New York Fed’s Innovation Center ran a 12-week pilot called the Regulated Liability Network with Citi, HSBC, Wells Fargo, Mastercard, PNC, and BNY Mellon, and concluded that the model was viable. A follow-up pilot in the UK with Barclays, Lloyds, NatWest, and several others reached the same conclusion in 2024.

Can credit unions build shared infrastructure for stablecoins and core banking?

The GENIUS Act creates a statutory path for qualifying subsidiaries of federally insured credit unions to seek authorization to issue payment stablecoins, but the NCUA’s implementation framework is still being finalized. The GENIUS Act and NCUA’s proposed rules contemplate licensed payment stablecoin issuers organized as subsidiaries of federally insured credit unions. A collaboratively owned CUSO may offer a potential structure for sharing costs and capabilities, but its eligibility, ownership structure, licensing path, and permissible activities would need to comply with the final NCUA rules and applicable federal and state CUSO restrictions. Credit unions already collaborate through shared service organizations for lending, compliance, and IT. A shared ledger extends that same cooperative model from services to infrastructure. The credit unions that participate in shaping shared ledger infrastructure early will have a say in how it works. The ones that wait will adopt whatever the largest banks and core providers build without them.

What should credit union leaders ask their core provider right now?

Every core contract renewal is a chance to ask direct questions. Here are the ones that matter most:

• What is your roadmap for tokenized deposits, stablecoins, and shared settlement, and when will credit union clients see those capabilities?
• What happens to our member data and member relationships if that roadmap runs through a platform we don’t own a piece of?
• Where are you investing your engineering talent, capital, and long-term product strategy, and how and when will those investments benefit credit union clients specifically?
• If you sell or divest infrastructure assets, how are you reinvesting the proceeds, and do those reinvestments serve credit unions or primarily the largest banks?

As core providers increasingly invest in tokenized deposits, stablecoins, and shared ledger capabilities, credit unions should ensure those investments benefit their institutions and members. The organizations that help shape this next generation of infrastructure will influence its direction. Those that wait may find themselves adapting to decisions made by their core providers and the industry’s largest institutions.

Published by Larry Pruss on August 7, 2026