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Banks support cryptocurrency trading mainly by connecting exchanges and stablecoin systems to conventional money: they maintain accounts, move fiat currency, safeguard assets and sometimes provide credit or trading services. These roles help trading function, but they are not all the same as a bank quoting crypto prices or taking crypto inventory as a market maker.

What “bank liquidity” means in crypto markets

Liquidity is the ability to buy or sell an asset without having to wait for a counterparty or accept an unusually large change in price. In crypto trading, several different services can help make that possible. A bank may supply the payment connection that lets an exchange receive deposits and return sale proceeds; another institution may safeguard assets backing a stablecoin; a bank may execute a customer’s trade or quote prices in a crypto-related instrument.

Those contributions are not interchangeable. A bank account gives a crypto business access to payment and deposit infrastructure. It does not, by itself, mean the bank owns cryptocurrency, guarantees that customers can withdraw from an exchange, or stands ready to buy and sell at quoted prices. Direct market making is a more specific activity: the institution posts prices at which it is willing to trade, potentially holding or hedging the resulting exposure.

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For readers trying to understand a particular trade, the useful questions are: who provides the tradable quote, which entity handles the fiat payment, who controls any crypto keys or reserve assets, and what happens if one part of the chain cannot settle? The answer may involve a bank, an exchange, a stablecoin issuer, a custodian and other intermediaries, each with a different role.

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How banks support the fiat on-ramp and off-ramp

Funding an exchange account

An exchange needs a way to receive and send conventional currency. A customer may transfer money from a bank account to the exchange or use another payment method. The exchange credits the customer’s account, and the customer can place an order under the venue’s rules. The exchange may hold or arrange custody of the purchased cryptoasset. The bank’s role in this sequence is to provide an account and process the fiat transfer; the exchange, rather than the bank, may be the venue matching or recording the crypto trade.

Withdrawing after a sale

When a customer sells crypto and asks to withdraw the proceeds, the exchange arranges the fiat payout through its banking relationship and the applicable payment system. The customer sees the completed withdrawal only after the relevant entities and rails have processed it. This is why access to reliable banking can affect how easily an exchange serves customers, even when the bank has not traded the cryptoasset or set its price.

Payment access is not the same as instant or continuous settlement. Blockchain transfers may be available at all hours, while some conventional payment systems operate on schedules or banking hours. The Bank of Canada has identified the contrast between continuous on-chain transfers and the operating hours of some fiat payment systems, as well as exchanges’ access to fiat banking, as part of the potential efficiency case for fiat-referenced cryptoassets. It is a description of a possible advantage, not a promise that all withdrawals clear immediately.

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Credit to crypto businesses

A bank can also lend to a crypto firm, as it may lend to other businesses. Credit can give the borrower financing for its operations, but the existence of a loan does not make the lender a crypto market maker. The borrower’s repayment capacity and collateral matter to the credit relationship; any market liquidity effect depends on how the borrower uses the funds and should not be assumed from the loan alone.

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How bank-linked stablecoin reserves support trading

A fiat-backed stablecoin has an on-chain token and an off-chain reserve relationship. The token is created and transferred on a blockchain, while the issuer holds a portfolio denominated in the currency the token references. An asset manager may manage that portfolio, and a financial institution may hold the reserve assets in custody. These arrangements connect a crypto-market trading and settlement instrument to conventional financial institutions and payment rails.

  1. Fiat reaches the issuer’s banking arrangement. When an exchange acquires stablecoins, it sends fiat through the traditional payment system to the issuer’s custodian.
  2. Payment is confirmed. After confirmation, the issuer transfers tokens to the exchange.
  3. The exchange makes tokens available for trading. It may distribute tokens to users or record trades and ownership changes on its own internal ledger.
  4. A user requests an on-chain transfer or redemption. An on-chain transfer moves tokens between blockchain addresses. A request to redeem for fiat instead depends on the issuer’s process and its off-chain payment and reserve arrangements.

Stablecoins can function as a trading or settlement medium inside crypto markets, so they may reduce the need to move fiat for every exchange transaction. That does not establish that every token can be redeemed at par in every circumstance, or that its market price will remain stable during stress. The token’s market liquidity, its issuer’s redemption arrangements and the liquidity of the reserve assets are related but distinct questions.

The split between on-chain transfers and off-chain banking also matters during disruption. A blockchain transfer may be possible while a fiat payment is waiting for the relevant banking service to operate or process it. Conversely, the ability to move a token on-chain does not prove that a recipient can convert it to bank money immediately. When assessing a stablecoin-related trade, distinguish token transfer availability from fiat redemption availability.

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Custody and execution are access services, not automatically market making

Custody generally means safeguarding assets and managing the controls needed to hold or transfer them. For cryptoassets, a key part of that work can involve managing private keys. A custodian can help an institution handle assets securely, but safekeeping alone does not mean it is posting buy and sell prices or taking inventory risk.

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Execution is another separate function. In May 2025, the U.S. Office of the Comptroller of the Currency said national banks and federal savings associations may buy and sell assets held in custody at a customer’s direction. The OCC also said they may outsource permissible custody and execution activities, subject to third-party risk management, safe-and-sound operation and applicable law. This guidance concerns U.S. institutions; it should not be read as a universal permission for banks in every country or as evidence that all banks offer these services.

A customer-directed sale and a bank’s own market-making quote are different transactions. In the first, the bank acts on an instruction concerning a customer’s assets. In the second, the bank would be trading as a counterparty or intermediary on its own terms, with corresponding exposure and controls.

When banks provide more direct trading liquidity

Banks can be more directly involved by facilitating client trading in crypto derivatives, or by quoting two-sided prices in cryptoassets or related instruments. A two-sided market offers a price to buy and a price to sell, allowing counterparties to trade without first finding each other. If the institution takes the other side or holds a position, it has exposure that it may seek to hedge.

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The Bank of England’s 2022 assessment said banks then serving crypto markets mostly facilitated client trading in crypto derivatives, and that the activity was very limited. It described planned cryptoasset market-making activity as a possible source of greater direct bank exposure, depending on the institution’s positions and hedging. That is a dated UK assessment, not a current global count or proof of how extensively banks make crypto markets today.

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Direct market-making capacity can vary with an institution’s risk limits, applicable regulation and market conditions. Risks include price movements, the ability to hedge, counterparty defaults, operational failures and the possibility that an asset or instrument becomes difficult to trade. A bank that provides an exchange with an account or custody service should not be described as the source of a crypto trading quote unless it actually performs that role.

What the available figures do—and do not—show

European Central Bank figures published in 2025 describe activity at euro-area significant institutions. They indicate growth in reported crypto-related custody services, while deposits from major trading platforms were smaller in Q4 2024 than in Q3 2021. These are measures of custody and deposits, not a measure of the amount of crypto liquidity banks quoted or supplied directly.

Measure Reported figure What it covers
Crypto-asset and crypto-related investment-product custody services €4.7 billion in 2024, up from around €400 million in 2023 Services provided by euro-area significant institutions, according to the ECB’s 2025 reporting.
Deposits from major crypto-asset trading platforms €1.2 billion in Q4 2024, down from €2.5 billion in Q3 2021 The ECB said fewer than ten euro-area banks received these deposits and characterized the amounts as small.

Neither row says how much crypto a bank held as trading inventory, how much it quoted in a market, or how much volume it executed as a dealer. Custody is a safekeeping service; deposits are bank liabilities. Neither is a direct proxy for market-making depth.

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Where liquidity and stability risks can build

Concentrated or changing deposits

Deposits from crypto firms can be concentrated or volatile. If a relatively small number of banks serve a group of trading platforms, changes in those firms’ balances can matter to the receiving institutions. A deposit relationship supports a firm’s access to banking, but it does not guarantee that the bank will continue offering the same service under every market or supervisory condition.

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Stablecoin redemption pressure

The Bank of England has warned that a run on a systemic stablecoin backed by commercial-bank deposits could lead to withdrawals from the safeguarding bank and could require that bank to liquidate assets. The arrangement can therefore increase financial interconnectedness: pressure on the token can transmit to institutions holding the reserves. This is a risk scenario, not a claim that every stablecoin reserve uses bank deposits or that every redemption wave will create the same outcome.

Intermediaries using customer assets

Risks may sit outside a bank as well. A 2026 paper from the BIS Financial Stability Institute describes cryptoasset intermediaries that accept customer assets and use them for lending, market making or other activities. It identifies credit, liquidity and maturity risks, and notes that many jurisdictions lack safeguards comparable to those for traditional intermediaries, including deposit-insurance-like schemes or central-bank liquidity facilities. A firm using customer assets in this way is not simply performing ordinary bank deposit-taking; readers should identify the entity and the legal arrangement rather than infer protection from familiar financial language.

Operational and control failures

Custody, payments, execution and settlement each create operational dependencies. A transaction can be delayed or disrupted if the relevant service, technology, controls or counterparty fails. For a cryptoasset held in custody, the question of who controls the private keys matters; for reserves, the identity and role of the custodian matter; for fiat withdrawals, the payment path matters. A bank’s participation in one link does not eliminate risks in the other links.

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How U.S. bank permissions are described

In a 2025 clarification, the U.S. Federal Deposit Insurance Corporation listed custody, stablecoin reserves, market making, exchange or redemption agency, distributed-ledger settlement and payments, and lending among crypto-related activities. It stated that supervised institutions may engage in permissible activities without prior FDIC approval, while still managing safety-and-soundness, liquidity, operational, cyber, consumer-protection and anti-money-laundering risks. The statement concerns U.S. institutions and does not override applicable law or supervision for a specific activity.

The FDIC also said it expected to issue further guidance on banks’ engagement in particular crypto-related activities. Permission to conduct a category of activity is not the same as proof that a particular bank offers it, nor does it remove the need to assess the institution’s controls, counterparties and legal obligations. Rules and supervisory expectations differ by jurisdiction and can change over time.

How to identify the bank’s actual role in a trade

When a platform says a bank “supports liquidity,” ask what service the bank is actually supplying. The distinctions below prevent an account, custody arrangement or customer instruction from being mistaken for a direct market quote.

  • Is the bank moving fiat? An account or payment service supports deposits and withdrawals; it does not by itself establish that the bank trades crypto.
  • Is the bank safeguarding assets? Identify whether it holds customer crypto, stablecoin reserve assets or another asset, and who controls the relevant keys or accounts.
  • Is it executing a customer instruction? A customer-directed purchase or sale is different from a bank quoting prices from its own book.
  • Is the bank quoting a tradable price or taking exposure? That is the stronger indication of direct market intermediation. Establish whether the trade concerns spot crypto, a derivative or another instrument.
  • Which part settles on which rail? A trade can involve an exchange’s internal ledger, a blockchain transfer and a separate fiat payment. The timing and operating hours need not match.
  • What jurisdiction and date apply? Regulatory statements and activity assessments are tied to particular authorities, institutions and dates; do not generalize them to all banks.

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