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WEBTHREEPEDIA RESEARCH

[DEEP DIVE] Banks Build Their Own Stablecoin Killer

Zephyra|March 17, 2026|BPF
EXECUTIVE SUMMARY

A consortium of five U.S. regional banks — Huntington Bancshares ($225B in assets), M&T Bank ($214B), KeyCorp ($184B), First Horizon ($84B), and Old National Bancorp ($72B) — is building the Cari Network, a tokenized deposit platform running on Matter Labs' Prividium, a permissioned blockchain de...

"Innovation in digital assets should strengthen, not displace, the regulated banking system. Tokenized deposits, built on sound blockchain infrastructure, can modernize payments while keeping insured deposits at the core of economic activity." — Gene Ludwig, CEO of Cari Network and former U.S. Comptroller of the Currency

Executive Summary

A consortium of five U.S. regional banks — Huntington Bancshares ($225B in assets), M&T Bank ($214B), KeyCorp ($184B), First Horizon ($84B), and Old National Bancorp ($72B) — is building the Cari Network, a tokenized deposit platform running on Matter Labs' Prividium, a permissioned blockchain derived from ZKsync's zero-knowledge proof technology. The minimum viable product is scheduled for March 31, 2026, with full production targeted for Q4.

This is not a crypto experiment. It is the banking system's coordinated answer to a $315 billion stablecoin market that threatens to disintermediate the deposit franchise — the single most profitable relationship in commercial banking. Led by Gene Ludwig, a former Comptroller of the Currency, the initiative is designed to deliver stablecoin-grade speed (instant, 24/7 settlement) while keeping funds inside FDIC-insured balance sheets and under existing regulatory frameworks. JPMorgan's Kinexys platform, which already processes over $2 billion daily in tokenized deposit transactions, proves the model works at scale. Now the regional banks want in.

The stakes are systemic. Citi's Global Perspectives & Solutions group projects that tokenized bank deposits could support $100–140 trillion in annual transaction flows by 2030 — potentially surpassing stablecoins in institutional wholesale markets. A February 2026 New York Fed staff report frames the competition between stablecoins and tokenized deposits as a modern restatement of the "narrow banking" debate: should money creation and lending remain fused, or be pried apart? The answer to that question will determine the architecture of digital finance for a generation.

Table of Contents

  1. The Deposit Franchise Under Siege
  2. Inside the Cari Network: Architecture and Participants
  3. JPMorgan's Kinexys: The Proof of Concept at Scale
  4. The Regulatory Green Light
  5. The New York Fed's Framework: Narrow Banking Revisited
  6. Citi's $100 Trillion Projection
  7. Stablecoins vs. Tokenized Deposits: The Economic Trade-offs
  8. Key Takeaways
  9. Conclusion

The Deposit Franchise Under Siege

The stablecoin economy crossed $315 billion in market capitalization in March 2026, with Circle minting $2.5 billion in new USDC in a single week. USDC has overtaken USDT in transaction volume for the first time, capturing 64% of stablecoin throughput — a signal that regulated, transparent dollar instruments are winning the flow war. Circle's stock (CRCL) surged 87% in a month on the back of this shift.

For banks, the math is existential. Every dollar that migrates from a bank deposit to a stablecoin is a dollar that no longer funds the lending book, no longer generates net interest income, and no longer sits on a balance sheet that earns the bank a spread. The CLARITY Act, now advancing through Congress, would formalize stablecoin issuance rules — but conspicuously, it does not require stablecoin issuers to be banks. Payment companies, fintechs, and crypto-native firms could all issue regulated digital dollars, competing directly for the deposit base that banks have monopolized for centuries.

The banking system's response is not to fight tokenization — it is to co-opt it.

Inside the Cari Network: Architecture and Participants

The Cari Network represents the most significant coordinated effort by mid-size U.S. banks to enter the tokenized money space. The five design partner banks collectively hold approximately $779 billion in assets — a meaningful share of the U.S. regional banking sector.

Technology Stack: Cari runs on Prividium, Matter Labs' permissioned, privacy-preserving blockchain built on ZKsync's zero-knowledge proof architecture. This is a critical design choice. Unlike public blockchains where transaction data is visible to all, Prividium allows only approved participants — regulated banks — to operate nodes, while zero-knowledge proofs enable transaction verification without exposing counterparty data. Regulators retain audit access.

How It Works: A Cari deposit token is a digital representation of a deposit liability held at a participating bank, recorded on the Prividium distributed ledger. It is backed one-for-one by funds on the issuing bank's balance sheet. When Bank A's customer sends a token to Bank B's customer, the underlying deposit obligation transfers between institutions — instantly, at any hour. The token is not a new form of money; it is existing money on new rails.

Phased Rollout:

  • March 31, 2026: MVP launch — issuance, transfer, and redemption testing
  • Q3 2026: Pilot program with limited customer access
  • Q4 2026: Full production availability

Initially, banks will restrict transfers to their own customer bases, with interbank connectivity to follow. The Mid-Size Bank Coalition of America has endorsed the initiative, signaling broader industry interest beyond the five founding partners.

JPMorgan's Kinexys: The Proof of Concept at Scale

The Cari Network is not building in a vacuum. JPMorgan's Kinexys platform (formerly Onyx) has already demonstrated that tokenized deposits work at institutional scale, processing over $2 billion daily and exceeding $1.5 trillion in cumulative notional value.

JPM Coin (ticker: JPMD) is the first bank-issued, USD-denominated deposit token. In January 2026, JPMorgan announced plans to issue JPMD natively on the Canton Network, a privacy-enabled blockchain designed for synchronized financial markets. This followed a landmark cross-chain test with Chainlink and Ondo Finance, executing a Delivery versus Payment (DvP) transaction involving tokenized U.S. Treasuries settled against JPM Coin — proving that tokenized deposits can serve as the cash leg of securities settlement.

As Biswarup Chatterjee, Citi's Global Head of Partnerships and Innovation, noted: "Within the bank's network, tokenized deposits are an efficient way for our clients to get 24/7, always-on availability." He drew a clear line: tokenized deposits dominate inside the banking network, while stablecoins serve the external ecosystem where money leaves the bank's perimeter.

BNY Mellon's Chief Product and Innovation Officer Carolyn Weinberg echoed the thesis: tokenized deposits "provide us with the opportunity to extend our trusted bank deposits onto digital rails, enabling clients to operate with greater speed."

The Regulatory Green Light

Three regulatory developments have converged to make tokenized deposits viable in 2026:

1. Joint Interagency Guidance (March 5, 2026): The Federal Reserve, OCC, and FDIC issued joint guidance clarifying that tokenized representations of traditional financial instruments receive the same risk weight and capital treatment as their non-tokenized counterparts. This eliminates a major capital penalty concern that had frozen bank experimentation.

2. FDIC Deposit Insurance Clarity: The FDIC has signaled that tokenized deposits issued by insured depository institutions retain their deposit insurance coverage under existing frameworks. This is decisive — it means a Cari token carries the same FDIC guarantee as a checking account balance.

3. The CLARITY Act Framework: While primarily focused on stablecoins, the CLARITY Act's progression through Congress has accelerated bank urgency. Banks see a narrow window to establish tokenized deposits as the institutional standard before non-bank stablecoin issuers gain permanent regulatory footing.

The Conference of State Bank Supervisors (CSBS) has also weighed in, issuing guidance that state-chartered banks can participate in tokenized deposit networks within existing supervisory frameworks, broadening the addressable market beyond federally chartered institutions.

The New York Fed's Framework: Narrow Banking Revisited

The most intellectually significant contribution to this debate comes from the Federal Reserve Bank of New York. Staff Report No. 1179, published in February 2026 by economists Xuesong Huang and Todd Keister, frames the stablecoin-versus-tokenized-deposit competition as a restatement of the century-old "narrow banking" debate.

The core question: should the entity that provides payment instruments also be the entity that makes risky loans?

Traditional banking fuses these functions — deposits fund lending, creating credit but also systemic risk. Stablecoins separate them — reserves sit in safe assets (Treasuries, cash), providing payment utility without credit creation. This is, by definition, narrow banking.

The Fed researchers identify three equilibrium scenarios:

  1. Heavy regulation, limited risk-shifting: Tokenized deposits are welfare-optimal because they expand bank credit availability while maintaining regulatory safeguards.
  2. Light regulation, strong risk-shifting incentives: Stablecoins are preferable because they prevent banks from taking excessive risk with depositor funds.
  3. Moderate conditions: Competition between both forms is optimal, allowing the market to discover the right mix.

The policy implication is stark: the choice between tokenized deposits and stablecoins is not a technology debate — it is a fundamental decision about the structure of the financial system.

Citi's $100 Trillion Projection

Citi's Global Perspectives & Solutions group, in its landmark Stablecoins 2030: Web3 to Wall Street report, projects that tokenized bank deposits could process $100–140 trillion in annual transaction flows by 2030 — driven primarily by corporate demand for regulatory safeguards, real-time settlement, and embedded compliance.

The logic: if just 5% of global large-value payment volume migrates to tokenized form, bank tokens would process approximately $100 trillion annually. For context, the stablecoin market currently processes roughly $27 trillion annually — meaning tokenized deposits could exceed stablecoin volume by nearly 4x within four years.

Citi itself is moving aggressively. The bank rolled out tokenized deposit services in late 2024 and has been expanding the offering to global Fortune 500 clients throughout 2025-2026. Chatterjee emphasized: "We don't start with the asset. We typically start with our client need, and then we look at the pros and cons of each type of asset or financing instrument."

This client-first framing is important. Banks are not pursuing tokenized deposits because blockchain is fashionable — they are doing it because corporate treasurers are demanding programmable, always-on cash management. The technology is the means; deposit retention is the end.

Stablecoins vs. Tokenized Deposits: The Economic Trade-offs

The competition between these two forms of digital dollars is not zero-sum, but the economic implications diverge sharply:

| Dimension | Stablecoins | Tokenized Deposits | |-----------|------------|-------------------| | Backing | Treasuries, cash equivalents | Bank balance sheet (loans + reserves) | | Insurance | None (issuer risk) | FDIC-insured up to $250K | | Credit creation | None — narrow banking | Yes — supports lending | | Availability | Public, permissionless | Permissioned (bank clients) | | Regulatory burden | CLARITY Act compliance | Existing bank supervision | | Yield to holder | Currently restricted | Potential for interest pass-through | | Composability | Full DeFi integration | Limited to approved networks |

The critical tension is between safety and utility. Stablecoins offer universal access and DeFi composability but do not create credit and introduce issuer counterparty risk. Tokenized deposits preserve the credit creation function of banking — essential for economic growth — but sacrifice the open, permissionless nature that makes stablecoins powerful.

For institutional users — corporates, asset managers, and financial institutions — tokenized deposits hold a decisive advantage: regulatory clarity, counterparty familiarity, and FDIC insurance. For retail users and the DeFi ecosystem, stablecoins remain the superior instrument.

The likely equilibrium is coexistence, with tokenized deposits dominating wholesale and institutional settlement while stablecoins dominate retail payments and on-chain commerce.

Key Takeaways

  • The Cari Network's March 31 MVP launch marks the first coordinated effort by U.S. regional banks to deploy tokenized deposits on zero-knowledge proof infrastructure, directly challenging stablecoins in the institutional settlement market.

  • JPMorgan's Kinexys ($2B+ daily volume, $1.5T cumulative) has already proven the model — tokenized deposits work at scale for institutional money movement.

  • Joint interagency guidance from the Fed, OCC, and FDIC (March 5, 2026) eliminates the capital treatment ambiguity that previously blocked bank participation, while confirming FDIC insurance coverage for tokenized deposits.

  • Citi projects tokenized bank deposits could process $100–140 trillion annually by 2030 — potentially 4x current stablecoin volume — driven by corporate demand for regulated, always-on settlement.

  • The New York Fed frames this as a "narrow banking" question: the choice between stablecoins and tokenized deposits will determine whether digital money creation remains fused with lending or gets permanently separated.

  • The competitive dynamics favor coexistence, with tokenized deposits dominating institutional wholesale markets and stablecoins retaining dominance in retail payments and DeFi.

Conclusion

The launch of the Cari Network is a watershed moment — not because a few banks are testing blockchain, but because it represents the banking system's strategic decision to compete with stablecoins on their own terms rather than cede the digital dollar market to non-bank issuers.

The timing is not accidental. With the CLARITY Act advancing, FDIC insurance confirmed for on-chain deposits, and interagency capital guidance now settled, the regulatory preconditions are met. The technology — zero-knowledge proofs enabling privacy-preserving, permissioned settlement — is mature. And the commercial imperative — defending $779 billion in combined deposits from stablecoin disintermediation — is urgent.

What makes this development systemically important is not the technology but the economics. If tokenized deposits scale as Citi projects, the banking system retains its role as the primary creator of credit in the economy. If stablecoins win the institutional market instead, trillions of dollars migrate from bank balance sheets to Treasury-backed reserves, fundamentally shrinking the credit supply. The New York Fed's research makes clear: this is the narrow banking debate in digital form, and the outcome will shape monetary policy transmission for decades.

Banks are not late to blockchain. They are arriving exactly when it matters — with $779 billion in deposits, FDIC backing, and a regulatory framework their competitors cannot match.

Sources & References

  1. U.S. Regional Banks Building Tokenized Deposit Network on ZKsync to Rival Stablecoins — CoinDesk, March 17, 2026
  2. Banks Target Q4 Launch for Tokenized Deposit Network — PYMNTS, March 2026
  3. Cari Taps ZKsync's Prividium as US Banks' Answer to Stablecoins — Cointelegraph, March 2026
  4. Citi Argues Tokenized Deposits Belong at the Core of Finance — PYMNTS, 2026
  5. Beyond Stablecoins: Why Bank Tokens Could Boom — Citi Institute, 2026
  6. Stablecoins vs. Tokenized Deposits: The Narrow Banking Debate Revisited — Federal Reserve Bank of New York Staff Report No. 1179, February 2026
  7. Mid-Size Bank Tokenized Deposit Network Cari Adopts Prividium Blockchain — Ledger Insights, 2026
  8. Kinexys Achieves Cross-Chain Tokenized Asset Settlement — J.P. Morgan, 2026
  9. Tokenized Deposits: The Future of Tokenized Money for Financial Market Settlement — ABA Banking Journal, March 2026
  10. Stablecoin Economy Crosses $315B — Bitcoin.com News, March 2026
  11. Clinton Alum Eugene Ludwig Courts Banks for Stablecoin Alternative — American Banker, 2026
  12. FDIC Clarifies Process for Banks to Engage in Crypto-Related Activities — FDIC, 2025