Stablecoin Yield and the New Regulatory Boundary

Stablecoin regulation spent its first phase on reserves, redemption, licensing, and the basic question of whether privately issued digital money could operate inside the regulated financial system. In 2026, a harder question is moving to the center of the debate: who should be allowed to earn a return on a stablecoin, and under what circumstances?

Europe already has an enacted remuneration prohibition that applies to issuers and crypto-asset service providers. The European Union's Markets in Crypto-Assets Regulation, or MiCA, prohibits issuers from paying interest on regulated stablecoins. It also prevents crypto-asset service providers from granting interest when providing services related to e-money tokens. MiCA goes beyond a narrow definition of an interest payment. Benefits tied to how long a token is held can also qualify as interest, including certain compensation provided by third parties.^[1][2]

That boundary is now under review.

The European Commission is examining lending, borrowing, staking, decentralized finance, and the role of regulated firms that connect customers to DeFi protocols.^[3] The European System of Central Banks, comprising the European Central Bank and EU national central banks, has gone further in its response. It argues that the prohibition on stablecoin remuneration should cover indirect arrangements that recreate yield through lending, staking, liquidity mining, loyalty programs, and other structures.^[4]

Across the Atlantic, the legal architecture is different, but the economic question is becoming familiar. The U.S. GENIUS Act prohibits permitted payment stablecoin issuers from paying interest or yield solely for holding, using, or retaining a payment stablecoin.^[6] Congress then considered going further through the CLARITY Act. Its final Senate draft would have restricted certain deposit-like rewards offered farther down the distribution chain while preserving a range of transactional and activity-based incentives.^[7]

CLARITY did not advance. On September 15, the Senate failed to invoke cloture on the motion to proceed to the bill by a 49-50 vote, short of the 60 votes required. The stablecoin provisions therefore never became law.^[8]

The two jurisdictions remain far apart in institutional design and legal status. Europe has an existing remuneration prohibition and is considering how far that principle should extend into adjacent crypto markets. The United States has enacted an issuer-level prohibition, while broader restrictions on intermediary rewards remain unresolved.

Still, the underlying policy problem increasingly looks similar.

A stablecoin that pays no return competes primarily on payments, settlement, liquidity, and convenience. Add a market-linked return, and the economic proposition changes. The token begins competing for balances that might otherwise sit in bank deposits, money-market products, or other short-duration savings instruments.

That distinction is starting to define a new regulatory boundary for private digital money.

Why Yield Changes the Economics of a Stablecoin

Consider two dollar tokens that are otherwise identical.

Both trade at $1. Both can settle transactions around the clock. Both are backed by high-quality liquid assets. Both can be transferred across public blockchain networks within seconds.

The first pays its holder nothing.

The second delivers 4 percent per year.

Those products may use the same settlement technology, yet a household is likely to treat them differently. Holding the first involves an opportunity cost when interest rates are positive. It makes economic sense mainly when the token provides sufficient transactional value to compensate for the foregone return.

The second can serve a broader purpose. A user can keep funds there while receiving income, making the token more competitive with a savings account, money-market fund, or other cash-management instrument.

ECB Executive Board member Isabel Schnabel has acknowledged the importance of this distinction. In June, she observed that stablecoins have historically been less attractive as stores of value than money-market funds and remunerated bank deposits partly because stablecoins generally do not pay interest directly. She also noted that the global stablecoin market was close to $300 billion, with Tether and USDC accounting for roughly 90 percent of the total.^[10]

Remuneration therefore affects more than consumer returns. It influences what a stablecoin is used for, how long balances remain in it, and how directly it competes with conventional financial liabilities.

That has consequences for the institutions funding the traditional banking system.

Europe Already Has a Broad Stablecoin Interest Ban

MiCA provides a useful starting point because Europe has already legislated on remuneration.

Article 50 states that issuers of e-money tokens cannot grant interest in relation to those tokens. Crypto-asset service providers are subject to a similar restriction when providing services related to e-money tokens. The regulation also treats remuneration or other benefits linked to the length of time an e-money token is held as interest, including certain compensation or discounts received from an issuer or a third party. Article 40 establishes a comparable prohibition for asset-referenced tokens.^[1][2]

The logic is important.

A rule that applied only to a direct coupon from an issuer would be easy to route around. An issuer could potentially work with an affiliated platform, distributor, exchange, or other intermediary that passed an economically similar payment to the customer.

MiCA therefore already looks partly at economic substance.

The difficult cases begin when the stablecoin itself is no longer the source of the return.

Suppose a user takes €10,000 of stablecoins and lends them to another market participant. The borrower pays interest because the lender gives up liquidity and assumes repayment risk. Or the user places stablecoins in an automated market maker and earns trading fees while accepting price, smart-contract, and liquidity risks.

The resulting return is economically different from receiving 4 percent simply because €10,000 remained in a wallet.

Once those activities are brought into the same policy discussion, the boundary becomes harder to draw.

Europe's Review Is Moving Beyond the Issuer

The European Commission's 2026 MiCA review makes that difficulty explicit.

The consultation covers several areas that MiCA did not fully regulate, including DeFi, staking, crypto lending, and borrowing. The Commission is testing a wide range of possible approaches to decentralized finance. Among them are certification schemes for DeFi applications, restrictions on which protocols regulated crypto firms can connect customers to, public or private whitelists and blacklists, and even an option under which crypto-asset service providers would not facilitate connections to decentralized DeFi applications.^[3]

The consultation also raises the possibility that DeFi protocols and software developers offering non-custodial wallets could be required to obtain certification before making those products available to the public. Another option would prevent regulated crypto firms from connecting clients to uncertified DeFi protocols.^[3]

These ideas require careful characterization. They are consultation options. They are not enacted rules, and they do not amount to a formal European Commission proposal for a blanket ban on DeFi. The Commission's own document states that it is a working document and does not represent a final policy position. The review may eventually support legislative changes, but that decision has not been made.^[3]

The European central banking system has taken a more defined position on remuneration.

In its September response to the MiCA review, the ESCB argued that stablecoin remuneration should continue to be prohibited and that the restriction should extend into areas that remain outside MiCA's current scope, including crypto borrowing, lending, and staking.^[4]

Its concern is straightforward. A stablecoin can be transformed into a yield-bearing position after issuance. DeFi protocols can facilitate lending, staking, and layered arrangements that reproduce some of the economic characteristics regulators sought to restrict at the issuer level.

The ESCB therefore argues that maintaining and, where necessary, strengthening restrictions on direct and indirect remuneration should be a legislative priority. Its examples of potential indirect remuneration include rewards, fee reductions, bundled services, loyalty-program benefits, and liquidity-mining incentives embedded in DeFi arrangements.^[4]

The European Banking Authority is moving in a similar direction on lending. On September 24, the EBA recommended bringing crypto-asset lending into the EU regulatory framework, including activities linked to decentralized finance. At the same time, the EBA described MiCA's existing framework for stablecoin issuers as broadly appropriate.^[5]

The distinction matters. Europe is not revisiting the legitimacy of regulated stablecoins from first principles. The regulatory perimeter around them is becoming the subject of the next debate.

When Does Stablecoin Yield Become Lending Income?

This may become the hardest technical question in the European review.

Take a simple lending transaction.

A user owns 10,000 units of a euro stablecoin. The issuer pays no interest. The user deposits those tokens into a lending protocol. A borrower takes the stablecoins and pays an annualized borrowing rate of 5 percent. After protocol fees and other costs, the original user receives 4 percent.

The return did not arise because the stablecoin sat passively in a wallet. The user supplied capital into a credit market.

That difference brings additional risks. The lender can face smart-contract risk, liquidation mechanics, collateral volatility, oracle failures, governance risk, and potentially counterparty exposure depending on the structure. Liquidity may disappear precisely when the lender wants to exit.

Calling all of that return "stablecoin interest" would erase economically relevant distinctions.

A similar issue arises with liquidity provision. A market maker who supplies USDC and another asset to a trading pool can earn transaction fees. Those fees compensate the provider for supplying liquidity and accepting risks that a passive token holder does not bear.

Staking creates yet another category. Returns may derive from validating transactions or participating in a blockchain's economic security. Whether a stablecoin is involved somewhere in the arrangement does not by itself establish that the return represents interest on the stablecoin.

This is where a functional regulatory approach becomes useful.

The first question should be where the return comes from. The second is what risk the customer assumes in exchange for it. Regulators can then examine whether an arrangement reproduces passive deposit-like remuneration or represents a separate financial activity with its own risk and return structure.

The ESCB itself argues that classification of lending and staking should consider legal and contractual characteristics as well as economic substance. Its response recommends EU-level regulation of staking, lending, and borrowing, with distinctions between agency services, investment services, and banking-type activities.^[4]

That leaves Europe with a difficult calibration problem. An anti-circumvention rule that is too narrow can be bypassed through intermediaries. A rule drawn too broadly could bring ordinary lending and liquidity provision inside a prohibition originally designed for passive stablecoin remuneration.

DeFi Turns a Legal Boundary Into an Architecture Problem

Decentralized finance complicates the issue because many traditional regulatory tools assume there is an identifiable intermediary.

A centralized platform can be licensed. Its executives can receive supervisory orders. Regulators can inspect its books, impose capital requirements, and restrict the products it offers.

Some decentralized protocols can be accessed directly without a conventional intermediary, which complicates entity-based supervision. Users may interact with protocols through their own wallets, while liquidity providers and other participants can be distributed across jurisdictions.^[3]

European policymakers are therefore examining the gateways around decentralized infrastructure.

Question 62 of the Commission consultation asks whether regulated crypto-asset service providers should conduct due diligence on DeFi protocols before connecting customers to them. The options presented to respondents range from disclosure-based access to certification requirements, verified liquidity pools, whitelists and blacklists, and a scenario in which CASPs would not facilitate connections to decentralized DeFi applications at all.^[3]

Later questions consider certification schemes for protocols and smart contracts. One option would prevent CASPs from connecting customers to uncertified DeFi protocols. Another asks whether developers offering non-custodial wallets should be required to obtain certification before making the software publicly available.^[3]

These are consultation options, not settled policy. Even so, they illustrate how the regulatory architecture could develop.

A regulator does not necessarily need to disable a decentralized protocol to reduce its availability to mainstream customers. It can regulate the gateways.

A sophisticated user might still interact directly with smart contracts. A mainstream customer using a regulated exchange, hosted wallet, or European crypto platform could encounter a much narrower set of available protocols.

The tradeoff is familiar across financial regulation.

A controlled gateway can support disclosure, due diligence, AML/CFT controls, and consumer protection. It can also concentrate access decisions among a relatively small group of regulated intermediaries. Certification requirements may favor protocols and firms with the resources to satisfy formal compliance processes. Smaller or genuinely decentralized systems could face higher barriers even if the underlying code remains publicly available.^[3]

The result could be a two-layer market: permissionless infrastructure at the protocol level, with increasingly permissioned access through regulated distribution channels.

That possibility deserves more attention than the shorthand question of whether Europe will "ban DeFi." The possible regulatory mechanisms are more granular, and they could prove more consequential for ordinary users.

The United States Reached the Same Question Through a Different Route

The U.S. debate starts from another legal structure.

The GENIUS Act, enacted in July 2025, created a federal framework for payment stablecoins. Among its provisions is a prohibition preventing permitted payment stablecoin issuers and foreign payment stablecoin issuers from paying holders any form of interest or yield solely in connection with holding, using, or retaining a payment stablecoin.^[6]

That language leaves an obvious market-structure question.

What happens when the issuer pays nothing, but an exchange, wallet provider, distributor, or another third party offers a reward?

The Senate's final CLARITY Act draft tried to address that problem.

Section 10404 would have prohibited covered parties from directly or indirectly paying interest or yield solely for holding payment stablecoins. It also targeted payments on stablecoin balances that were economically or functionally equivalent to interest on an interest-bearing bank deposit.^[7]

Yet the draft preserved several types of activity-based and transactional rewards.

The permitted categories included incentives tied to payments, transfers, conversion, remittances, and settlement; compensation for providing liquidity, posting collateral, or putting assets at credit or investment risk; and rewards connected with governance, validation, staking, loyalty programs, promotional programs, or subscriptions.^[7]

The draft went further. It contemplated that otherwise permissible payments could, subject to implementing regulations and the broader prohibition, be calculated by reference to balance, duration, tenure, or combinations of those factors.^[7]

Banking groups objected to that structure. The American Bankers Association, Independent Community Bankers of America, and state banking associations argued that rewards linked to balance and holding duration could function too much like deposit interest and should be restricted more tightly.^[9]

That is an industry position, not an established empirical finding about the effect of stablecoin rewards on bank funding.

The final draft also contained a mechanism focused explicitly on community-bank deposit flight. It contemplated regulatory action if the Treasury secretary determined that transfers from interest-bearing deposits into stablecoins, connected to activities regulated by the section, were causing a substantial detrimental effect on community banks.^[7]

The Senate never reached a final-passage vote on that text.

On September 15, the Senate voted 49-50 against invoking cloture on the motion to proceed to H.R. 3633. Sixty votes were required. Senator Thom Tillis voted no, then moved to reconsider the cloture vote, preserving a procedural route for the Senate to revisit it.^[8][13]

Section 10404 is therefore best understood as evidence of the policy boundary U.S. lawmakers were trying to draw. It does not describe current U.S. law.

Follow the Deposit, Then Follow the Reserve

The banking debate becomes clearer when the balance-sheet mechanics are separated from the politics.

Suppose a household holds $1,000 in a checking or savings account at Bank A.

The household uses that money to buy $1,000 of stablecoins.

Bank A loses a $1,000 customer deposit. The stablecoin issuer, or its reserve manager, receives $1,000 of cash and must place the corresponding reserve somewhere.

If that $1,000 becomes a deposit at Bank B, the banking system has not necessarily lost $1,000 of deposits in aggregate. The composition has changed. Bank A has lost a retail deposit, while Bank B has gained a deposit associated with a stablecoin issuer or reserve manager.

Those liabilities may behave differently.

Retail deposits are often diversified across large numbers of households. A stablecoin issuer's account can be large, concentrated, and sensitive to redemption flows. A bank receiving those funds therefore may gain funding that is economically less stable than the deposits lost elsewhere.

The ECB has highlighted precisely this concern. Schnabel has argued that stablecoin growth could replace relatively stable retail deposits with more concentrated, rate-sensitive, and potentially more volatile wholesale funding, altering the structure of bank liabilities.^[10]

The picture changes again when the issuer invests reserves in Treasury bills or similar government securities.

In that case, the funding leaves the original bank's retail deposit base and is transformed through securities markets. Depending on who sells the Treasury security, where the cash settles, and subsequent government spending, money can reappear as a deposit elsewhere in the system. The path matters.

For an individual bank, however, the effect can still be material. A bank that loses stable retail deposits may need to replace them through wholesale funding, higher deposit rates, asset sales, or slower balance-sheet growth.

None of this supports a simple one-for-one rule in which every dollar entering a stablecoin automatically destroys a dollar of bank lending capacity.

Banks can adjust their liabilities. Deposits can migrate between institutions. Stablecoin reserves can return to the banking system. Treasury purchases can move liquidity through several balance sheets before settling.

The effect on credit depends on funding costs, liquidity requirements, capitalization, reserve composition, market conditions, and which institutions gain or lose the deposits.

That complexity explains why the deposit-substitution debate needs evidence rather than slogans.

Europe Is Also Rethinking Where Stablecoin Reserves Sit

One of the more revealing developments in the European debate concerns reserve composition.

MiCA currently requires issuers to hold minimum portions of stablecoin reserves as bank deposits. The requirement is generally 30 percent, rising to 60 percent for significant stablecoins. In its September response, the ESCB recommended removing those predefined minimum bank-deposit percentages and replacing them with liquidity requirements that would establish minimum floors for assets maturing within one and five working days, using those time buckets as a possible starting point for calibration.^[4]

Reuters highlighted that proposal on September 22, noting the central banks' concern that mandatory deposit holdings could leave banks exposed to stablecoin-market movements and replace relatively sticky retail funding with more volatile issuer deposits.^[12]

At first glance, that position may seem counterintuitive.

European central banks are concerned about deposits leaving banks for stablecoins, yet they are also questioning rules that force stablecoin issuers to place a substantial share of reserves back into banks.

The explanation lies in the type of funding.

A requirement that stablecoin issuers redeposit large pools of reserves into commercial banks can create concentrated liabilities whose size moves with stablecoin issuance and redemption. During rapid redemptions, an issuer may withdraw those deposits quickly. That could make them a less reliable source of funding than the diversified household deposits displaced when users first purchased stablecoins.

The same regulatory debate can therefore produce two apparently different policy preferences: limiting the ability of stablecoins to attract savings balances through yield, while also reducing banks' dependence on stablecoin issuers as large depositors.

Both are connected to funding stability.

This is where the European discussion becomes broader than a simple prohibition on interest. Policymakers are examining how the entire stablecoin balance sheet interacts with commercial banking.

Why Regulators Care So Much About Remuneration

A non-interest-bearing stablecoin has a natural constraint when policy rates are positive.

A consumer holding $20,000 in a token yielding zero gives up income that could be earned in a savings account, money-market fund, or Treasury product. The stablecoin therefore needs to compensate through convenience, settlement speed, programmability, cross-border access, or other services.

Yield changes that calculation.

If the token, or a closely connected product, offers a return comparable to short-term market rates, users may be willing to maintain larger balances for longer periods.

The stablecoin then starts competing for the liability side of the financial system.

Commercial banks care because deposits finance part of their loan and securities portfolios. Central banks care because deposit pricing and bank funding are part of the transmission mechanism through which policy rates affect credit conditions and the wider economy.

In a May speech, ECB President Christine Lagarde argued that the implications deepen when stablecoins are remunerated because holders of dollar stablecoins backed by Treasury bills become indirectly exposed to the returns on U.S. government debt. She cited research finding that stablecoin inflows can affect short-dated Treasury yields, particularly during periods of scarcity.^[11]

That creates another transmission channel.

A large stablecoin industry backed primarily by short-term government paper could move substantial household and corporate cash balances away from bank deposits and toward sovereign debt markets. Depending on scale and design, the result could alter Treasury demand, bank funding costs, and the distribution of liquidity across the financial system.

Those effects are plausible. Their magnitude remains an empirical question.

At roughly $300 billion globally, the scale of stablecoins has increased rapidly, but the magnitude of their eventual macro-financial effects remains uncertain.^[10] Scale, adoption patterns, reserve composition, and interest-rate conditions will determine how significant those effects become.

Regulatory Arbitrage and Genuine Risk Taking Are Different Problems

The strongest argument for expanding remuneration rules concerns circumvention.

Imagine an issuer is legally prohibited from paying stablecoin holders 4 percent. It then funds an affiliated platform that pays users 4 percent for keeping the same stablecoin in an account, with the reward calculated purely according to balance and time held.

Economically, the customer experience closely resembles issuer-paid interest.

A prohibition that ignores such structures may have little practical effect.

The analysis changes when the user performs a separate financial activity.

Someone who lends stablecoins to a borrower exposes capital to lending risk. A liquidity provider commits assets to facilitate trading. A validator performs network functions. These activities can generate a return because the user supplies capital, liquidity, or services while assuming additional risk.

Treating every return involving a stablecoin as disguised interest could collapse several economically distinct activities into one category.

This tension appears in both the European discussion and the failed U.S. proposal.

CLARITY attempted to preserve compensation associated with liquidity provision, collateral, credit and investment risk, staking, payments, and other activities.^[7] European policymakers are now examining how lending and staking should be regulated and whether those activities can be used to circumvent MiCA's remuneration prohibition.^[3][4]

The central policy challenge is classification.

What economic activity generated the return?

Who bears the risk?

Is the payment available simply because a customer held a stablecoin, or did the customer supply capital into a separate transaction?

Is the intermediary independent from the issuer?

Who ultimately funds the payment?

Those questions are less satisfying than a bright-line ban. They are also closer to how financial markets actually work.

Who Captures the Yield?

There is another question beneath the regulatory debate that receives comparatively little attention.

Stablecoin reserves produce income.

An issuer holding Treasury bills, government securities, or remunerated bank balances can earn a return on the assets backing the token. When interest rates are materially above zero, that return can be substantial.

If the stablecoin holder receives none of it, the income remains elsewhere in the business model.

Some pays operating costs. Some covers compliance, custody, liquidity management, distribution, technology, and capital. Depending on the structure, some may go to exchanges or other commercial partners. The residual accrues to the issuer and its owners.

Competition can return value to customers through lower transaction fees, subsidized services, rewards that remain permissible, or improved products. There is no guarantee that the entire spread becomes profit.

Still, regulation influences the distribution.

A rule that prevents passive reserve income from being passed directly to holders helps determine who can capture the economic return generated by the assets backing digital money.

That distributional question deserves attention alongside financial stability.

Banks themselves earn income by investing and lending against funding obtained from depositors, while deposit rates depend on competition, monetary conditions, product type, and customer behavior. Money-market funds pass much more of the return on short-term assets through to investors. Stablecoin issuers occupy a different legal and economic position.

Regulators are now deciding how different that position should remain.

A Transatlantic Pattern, With Important Limits

There is a temptation to describe the developments in Europe and the United States as a coordinated move against stablecoin yield.

The evidence does not support that characterization.

The EU has an enacted remuneration prohibition, a Commission review that is still gathering evidence, and formal recommendations from European financial authorities that could shape future legislation.^{[1][2][3][4][5]}

The U.S. has an enacted issuer-level yield prohibition under the GENIUS Act. CLARITY's broader rules did not advance through the Senate, leaving the treatment of third-party rewards less settled.^[6][7][8]

The institutional motivations also vary.

European central banks emphasize monetary transmission, bank funding, liquidity, financial stability, and the possibility of regulatory circumvention.^[4][10] The EBA focuses heavily on prudential and consumer risks around lending.^[5] The European Commission is exploring the perimeter of MiCA and has not committed itself to the more restrictive options in its consultation.^[3]

U.S. banking organizations have focused strongly on competition for deposits, particularly at community banks. They have argued that rewards tied to balances and holding periods can make stablecoins substitutes for bank deposits.^[9] Crypto firms and other market participants have argued for room to preserve activity-based rewards and other forms of competition around stablecoin products. The final CLARITY draft itself reflected that tension by prohibiting deposit-equivalent yield while preserving specified categories of transaction- and activity-based incentives.^[7]

The common thread sits at the level of market structure.

Both regulatory systems are being forced to ask what happens when a token designed as a payment instrument begins competing for savings balances.

Once that happens, stablecoins touch several parts of the financial system simultaneously. They become relevant to payments, bank funding, sovereign debt demand, credit intermediation, securities markets, and monetary-policy transmission.

Yield makes those connections stronger.

The Next Boundary for Private Digital Money

The first generation of stablecoin rules focused heavily on the issuer.

Does the token have credible reserves? Can holders redeem at par? Who supervises the issuer? What assets can back the liability? What happens in insolvency?

Those questions remain fundamental.

The next generation of regulation is reaching farther into the financial activity built around the token.

Europe is already considering how regulated intermediaries should interact with decentralized lending protocols and how staking, lending, and indirect remuneration fit within MiCA's architecture. The ESCB wants a broad anti-circumvention approach to stablecoin remuneration. The EBA wants crypto lending brought inside the regulatory perimeter. The Commission is considering options that could make access to some DeFi protocols dependent on certification or the decisions of regulated intermediaries.^[3][4][5]

The United States has reached many of the same economic questions through a different legislative path. GENIUS settled the issuer-level rule. CLARITY attempted to define what could happen beyond the issuer, including the dividing line between deposit-like yield and returns generated by payments, liquidity provision, staking, collateral, or other activities. That attempt remains unfinished.^[6][7][8]

How policymakers draw that boundary will shape the economics of stablecoins well beyond the crypto industry.

A payments token that cannot deliver a market return may still become an important settlement instrument. Its appeal as a place to hold savings will remain constrained whenever conventional cash products pay materially more.

A token that can move seamlessly into lending, liquidity, or other remunerated products begins to occupy a larger part of the financial system. It can compete for balances, supply funding to new credit markets, and redirect demand toward the assets held in reserve.

The challenge is preserving economically meaningful distinctions while addressing genuine opportunities for regulatory arbitrage.

Passive interest for holding a token, a reward funded by an affiliated distributor, income earned from lending capital, and fees collected for providing market liquidity all place money in a user's account. They do not arise from the same activity or carry the same risks.

Europe's current review will test how much those distinctions matter in law. The unresolved U.S. debate shows that the same problem does not disappear when legislators choose a different framework.

Stablecoins have already crossed the threshold from crypto product to regulated financial infrastructure. The next question is more consequential: how much of the traditional savings, funding, and credit system will they be allowed to replicate around that infrastructure?

That answer will determine who competes for short-term money, who bears the resulting risks, and who ultimately captures the income generated by digital cash.