US wire settlement runs on three rails that each solve a different problem. Fedwire Funds is a real-time gross settlement system run by the Federal Reserve Banks that settles individual USD large-value payments on the Fed's own books (FRBservices Wires). CHIPS, run by The Clearing House Payments Company, uses continuous multilateral netting with intraday finality on release and settles the majority of private-sector US-dollar large-value payments (The Clearing House CHIPS). CLS Bank International runs payment-versus-payment settlement for the FX market across eighteen currencies (CLS Settlement). The three rails coexist because gross, net, and PvP each answer a different question about settlement risk.
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Wholesale USD payments do not touch a single "wire" system. A large-value dollar payment between two US banks might settle on Fedwire, on CHIPS, or through a CLS FX leg that then debits Fedwire or CHIPS on the back end. Choosing the right rail depends on how much settlement risk the sender is willing to hold, how much liquidity the sender wants to lock up, and whether the payment is a standalone USD transfer or one leg of an FX trade. This article compares the three rails side by side, walks through what each one actually does, and points to where stablecoin rails now compete with wire settlement on specific corridors.
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The comparison below uses the Bank for International Settlements Committee on Payments and Market Infrastructures taxonomy for settlement models (BIS CPMI Principles for Financial Market Infrastructures) and daily-value figures published by each operator on its own canonical statistics page.
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Fedwire Funds is the Federal Reserve's large-value USD payment system. Every payment settles individually and irrevocably by debiting the sending bank's reserve account at its Federal Reserve Bank and crediting the receiving bank's reserve account, with no netting between counterparties per the Federal Reserve's Fedwire operating documentation (FRBservices Wires). Settlement is in central bank money, which is the highest-quality settlement asset available in the US payment system per the BIS CPMI principles (BIS CPMI PFMI).
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Recent volume is large. The Federal Reserve publishes annual Fedwire Funds statistics that show roughly $4T to $4.6T in average daily value across recent years per the Federal Reserve Fedwire annual stats page. The Fedwire Funds Service is open on business days across a long operating window; specific hours are published on the FRBservices operating hours page. Two adjacent Fedwire services should not be confused with Fedwire Funds: Fedwire Securities Service settles US government and agency securities on the Fed's books, and FedNow is a separate instant retail rail launched on 2023-07-20 for lower-value payments per the Federal Reserve FedNow page.
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Fedwire's tradeoff is well-understood. Gross settlement removes principal risk on every individual payment because there is no exposure to a netting cycle, but it requires the sending bank to hold intraday liquidity equal to the payment size. For the fundamentals of gross versus net settlement and why Fedwire chose the gross model, see how RTGS reduces settlement risk.
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CHIPS, the Clearing House Interbank Payments System, is the private-sector complement to Fedwire for large-value USD payments. It is owned and operated by The Clearing House Payments Company L.L.C., which is itself owned by a group of the largest US commercial banks per The Clearing House (The Clearing House CHIPS). Settlement is not gross. CHIPS runs a continuous multilateral netting algorithm through the day, releasing batches of payments to final settlement whenever offsetting positions can be matched under the risk framework, and each released payment is final on release per the CHIPS operating rules published by The Clearing House (CHIPS payment system operations manual).
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Daily volume is material. The Clearing House reports CHIPS at approximately $2T per day on the CHIPS product page and publishes the canonical CHIPS monthly Volume and Value report for current-period figures. CHIPS carries a large share of correspondent-bank flows and USD legs of FX trades that do not need per-payment central-bank-money finality, in exchange for materially lower intraday liquidity requirements than Fedwire.
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CHIPS is often described casually as an RTGS system. That description is not accurate. CHIPS uses a hybrid model with continuous multilateral netting and intraday finality on release, and the settlement infrastructure registry that Eco maintains flags the RTGS label as a common error to avoid when writing about CHIPS. The distinction matters because netting-based systems trade lower liquidity requirements for exposure to a netting cycle, which is exactly the risk RTGS is designed to remove. For the taxonomy that draws the RTGS-versus-net line cleanly, see net vs gross settlement.
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CLS Bank International is a US Edge Act bank supervised by the Federal Reserve as a systemically important financial market utility (Federal Reserve designated FMUs). Its core service, CLS Settlement, provides payment-versus-payment settlement for the FX market: the two currency legs of an FX trade settle atomically on the CLS books across the participating national RTGS systems, so neither counterparty can end the day having paid its leg without receiving the other (CLS Settlement).
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Coverage spans eighteen currencies today: USD, EUR, JPY, GBP, CHF, CAD, AUD, NZD, SEK, NOK, DKK, SGD, HKD, KRW, ZAR, MXN, ILS, and HUF per the CLS Settlement product page (CLS Settlement). Daily settlement value is large enough to make CLS one of the most systemically important FMUs in the world; the canonical live figure is published on the CLS monthly FX settlement volumes release page (CLS monthly FX settlement volumes).
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The problem CLS was built to solve is Herstatt risk, named after the German bank Bankhaus Herstatt whose 1974 failure mid-settlement day left counterparties who had already paid Deutsche Marks holding an unsecured claim for USD they never received per the BIS (BIS Herstatt case study). PvP settlement eliminates that principal risk on trades where both legs are CLS-eligible currencies. For counterparty pairs, currencies, or trade sizes outside CLS eligibility, FX settlement still runs through the correspondent-banking chain and is exposed to the same time-zone and pre-funding problems documented by the BIS CPMI (BIS CPMI operating hours report).
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Stablecoin rails now compete with wire settlement on three specific dimensions. Availability: public chains run 24 hours a day, 7 days a week, with no cutoff windows, whereas Fedwire, CHIPS, and CLS all operate on business-day schedules with defined open and close times per each operator's published operating hours (FRBservices operating hours). Atomic settlement: a stablecoin transfer is a single onchain state transition that is final on inclusion per Ethereum consensus documentation (ethereum.org consensus docs), which removes exposure to a netting cycle in the same structural way Fedwire's RTGS design does, while removing the cutoff constraint that Fedwire retains. Single-hop settlement: a stablecoin transfer settles peer-to-peer between two wallet addresses, so it collapses the multi-hop correspondent-banking chains that route dollar payments across borders today.
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The two largest dollar-denominated stablecoins are USDC and USDT. USDC is issued by Circle Internet Financial and reserved against short-duration US Treasury bills and cash held with regulated custodians per Circle transparency (Circle transparency). USDT is issued by Tether Holdings and reports reserve composition on a quarterly attestation basis per Tether transparency (Tether transparency). Network fees are not zero on any corridor: Ethereum-layer transfers pay ETH gas priced by the base fee and priority fee mechanics per the EIP-1559 specification (EIP-1559), and Tron network fees for USDT transfers are set by the Tron energy and bandwidth model per the Tron developer documentation (Tron resource model).
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Regulatory framing matters for institutional adoption. In the United States the GENIUS Act, signed into law on 2025-07-18, establishes the first federal framework for payment stablecoin issuers and takes full effect on the earlier of eighteen months after enactment or one hundred twenty days after the primary federal regulators finalize implementing regulations per the House Financial Services Committee summary. The FSB has been explicit that stablecoin rails are additive to, not a replacement for, the reform work on cross-border payments (FSB cross-border payments), which is why Fedwire, CHIPS, and CLS remain load-bearing for the payments that require central-bank-money finality or PvP settlement across CLS-eligible currency pairs.
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The choice among the three rails follows the shape of the payment. A standalone USD large-value payment that needs central-bank-money finality on each individual transfer settles on Fedwire. A standalone USD large-value payment that can accept intraday finality on release under a netting algorithm, in exchange for lower intraday liquidity requirements, settles on CHIPS. An FX trade with both legs in CLS-eligible currencies settles PvP on CLS, with the USD leg debiting Fedwire or CHIPS at the back end and the counter-currency leg debiting the relevant national RTGS system. FX trades outside CLS eligibility, and cross-border USD payments to jurisdictions outside the correspondent-bank reach of the two US wire systems, still route through the correspondent-banking chain and inherit the settlement-risk and pre-funding-cost characteristics of that model.
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For the settlement-model taxonomy that underlies all three US wire rails, see Net vs Gross Settlement: RTGS and DNS Explained. For the multi-hop chain that carries USD payments to jurisdictions outside direct Fedwire and CHIPS reach, see Correspondent Banking Explained: Why Cross-Border Payments Still Take Days. For the pre-funded balances that sit inside every correspondent leg, see Nostro and Vostro Accounts: The Real Cost of Correspondent Banking.
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