Stablecoin Weekly: What Backs the Dollar

On June 3, Mastercard said it would settle six regulated stablecoins across eight blockchains, the clearest sign yet that the card networks mean to run dollars on-chain rather than around them. Over the same few days, a sharp crypto selloff knocked a handful of newly built "stablecoins" below their pegs. That split is the week. After a strong jobs report, markets gave up on a June rate cut, and on the prospect of cuts at all this year; Treasury yields rose and crypto fell, and the on-chain dollar market divided along a clean line: the dollars backed by cash and Treasuries held their value, while the dollars backed by volatile or borrowed assets did not. The payment rails, meanwhile, kept advancing as if the drawdown were beside the point, which for their purposes it was. The spring's fight was over who would distribute the dollar; this week asked a more lasting one, which dollars keep paying a dependable yield when rates rise and crypto falls, and the answer came down to what each one holds in reserve.

• Rising rates and a crypto selloff split the on-chain dollar market by what backs it. Markets gave up on a June rate cut, Treasury yields firmed, and crypto fell hard, with bitcoin dropping below $60,000 to its lowest since 2024 and $1.5B to $1.8B of leveraged positions liquidated. The dollars backed by cash and Treasuries held; the dollars backed by volatile or borrowed assets did not.
• The break hit dollars built on a company's own securities, not the regulated base. Strategy's STRC, a bitcoin-backed preferred share engineered to trade near its $100 par, fell to about $90 at its June 5 low, roughly a tenth below par, and apxUSD, a token almost entirely backed by STRC, broke to about $0.90. Tokenized treasuries and regulated savings kept their pegs and their yields.
• The payment rails kept advancing through the drawdown. Mastercard moved to settle six stablecoins across eight chains, and MoneyGram and Deel each launched Stripe-issued dollars for consumer and payroll use. None of it waited on the price action.
• Supply contracted a second straight week, and cash now out-yields the chain. Aggregate stablecoin supply fell about $4B to roughly $314B, the 3-month Treasury bill rose above every base on-chain dollar rate, and money-market funds reached a record $7.89T. Holding a dollar token that pays nothing has rarely cost more this cycle.

Aggregate supply contracted for a second straight week, and this time the decline was broad rather than one issuer's redemption. The level remains historically high; the direction is now unambiguous.

• Total stablecoin market cap eased to roughly $314B on DefiLlama as of June 7, down about $4B (1.3%) on the week and roughly $9B off the mid-May record near $323B. Trackers diverge from about $311.7B (CoinGecko) to $318.3B (CoinMarketCap) on methodology, so treat the level as a band and the second consecutive contraction as the reliable signal. A tentative bounce on June 8 and 9 sits outside this issue's window.
• USDT remained the largest absolute drag, off about $1.3B to roughly $187B, though the pace of its drain roughly halved from the prior week. Its share nonetheless rose to about 59.5%, because the long tail shrank faster than Tether did. Dominance concentrated as the market contracted.
• USDC softened about $0.4B to roughly $75.5B. PYUSD was the sharpest faller among the majors, down about 6.9% to roughly $2.84B. USD1 gave back about 2.3% and USDS about 2.8%.
• The only dollar tokens that did not shrink were USDe, flat near $4.5B, and Tether's U.S.-focused USAT, up about 6.4% from a small base to roughly $167M. The newest U.S. bank and crypto-bank dollars, SoFi's SoFiUSD and Anchorage's fUSD, are live but not yet at tracked scale.
• Tokenized U.S. Treasuries held roughly flat near $14.8B, slightly soft on a trailing-30-day basis, with Ethereum still hosting about half. Notably, holder count rose about 5.7% on the week even as total value plateaued: the base is broadening in accounts faster than in dollars.

The leaderboard kept its order under a flat top line.

• USYC (Circle) near $2.91B, displayed yield about 3.18%, still ahead of BUIDL.
• BUIDL (BlackRock / Securitize) near $2.46B (about 3.40%), narrowing the gap to USYC.
• USDY (Ondo) near $2.15B (about 3.55%), flat.
• iBENJI (Franklin Templeton institutional) near $1.59B; the retail BENJI near $837M, up on the month.
• WTGXX about $882M, JTRSY about $872M, USTB about $722M (the notable decliner), OUSG (Ondo) about $576M, and CUMIU about $548M at the category's highest displayed yield near 3.74%. Displayed yields across the largest products sat in a 2.8%-to-3.7% band.

The anchor firmed, and that set up the rest of the week. The market repriced from expecting a June rate cut to expecting none, pushing the 3-month Treasury bill to about 3.6% on a discount basis, near 3.8% on a coupon-equivalent basis, while effective fed funds held at 3.62%. Money-market funds drew a record $7.89T. For the first time this cycle, cash pays more than the base of the on-chain dollar market. That does not make on-chain yield obsolete; it raises the bar for it. A dollar token no longer earns a premium simply for living on-chain, so the yield above the bill now has to come from something real and underwritable, genuine credit, duration, or a well-built strategy, rather than from a passive spread. It is a more demanding market, and it favors the managers who can actually source and price those risks.

The savings layer drifted lower while the bill rose, widening the gap to cash. The Sky Savings Rate (sUSDS) held near 3.60%, now below both fed funds and the bill; no savings-rate change executed in the window, and the June 4 Spark spell was operational housekeeping rather than a rate move. Aave's Ethereum USDC supply rate fell to about 3.00% and USDT to about 2.65%, both well under the bill. The one clean above-cash, peg-stable savings rate left is Aave's sGHO at an administered 4.25%, and its cushion over the bill compressed to roughly 45 basis points as the front end firmed; that rate is set by governance, and a vote can cut it. The GHO peg held at $1.00. Morpho's curated USDC vaults (Steakhouse near 4.6%) remained the richest mainstream venue on roughly $11.5B of deposits, but that premium is curator selection and liquidity risk, not a base rate.

This is where the cycle bit. The mid-week selloff flushed leveraged longs and whipsawed perpetual funding, the engine of the basis trade. Ethena's sUSDe paid roughly 4% net of fees to a fresh deposit across the week, swinging with funding as the market sold off, and still a fraction of the roughly 9% gross trailing figure that aggregator dashboards continue to display. The wedge is Ethena's fee switch, which routes protocol earnings to sENA and the reserve fund before the residual reaches sUSDe holders, so underwriting the headline overstates what a deposit realizes by several points. USDe supply held near $4.5B. Maple's syrupUSDC and syrupUSDT printed roughly 4.6% to 4.7%, real private-credit interest below the platform's 6%-to-10% target band. Pendle's de-duplicated TVL fell about 23% to roughly $1.15B as fixed-term positions matured and rolled off. On MegaETH, the second monthly MEGA buyback that the USDe/USDm loop depends on remained unconfirmed by the close of the window, with a token unlock due June 23.

For two weeks the story had been distribution. The rate cycle changed the subject. As markets gave up on a June cut and Treasury yields rose, crypto sold off hard: bitcoin fell from the low $70,000s to below $60,000 by June 5, its lowest since 2024, and $1.5B to $1.8B of leveraged positions were liquidated. U.S. spot bitcoin ETFs saw a record weekly outflow near $3.4B, the streak finally breaking on June 5. On its face this is a price story, not a stablecoin one. Underneath, it was the hardest test the on-chain dollar market has faced this cycle, and it separated the dollars backed by cash from the dollars backed by something that falls when crypto does.

The break ran straight through the newest corner of the yield market: dollars built on a company's own securities. Strategy's STRC, a bitcoin-backed perpetual preferred share that the company markets as a high-yield cash-management instrument and engineers to trade near its $100 par, fell to an intraday low near $90 on June 5, roughly a tenth below par and its deepest break since the share was issued. The drop landed in the same week the broader market sold off and Strategy disclosed its first bitcoin sale since 2022, of 32 BTC. A share built to trade at $100 traded at $90.

The "stablecoins" that use STRC as collateral moved with it. Apyx's apxUSD, almost entirely backed by STRC and only barely over-collateralized, broke to about $0.90 on June 4 before recovering; Saturn's sUSDat, which holds STRC alongside Treasuries, slipped about 4%, while Saturn's Treasury-backed base token held its dollar peg. More than $200M of STRC now sits on-chain, wrapped by Ondo, Kraken, Saturn, Apyx, and others, and one analyst had called it "the backbone of an ecosystem of yield-backed stablecoin protocols." This week the backbone bent. The same strain showed one level up: BitMine, the largest corporate holder of ether (ETH), priced a new 9.5% weekly-dividend preferred share at $80 against a $100 value, an effective 11.9% yield, into a balance sheet holding roughly $9B of unrealized losses. Selling fresh yield paper a fifth below its face value is its own measure of what that capital now costs.

The lesson is not that yield failed. It is that the shock separated the dollars whose value depends on the price of crypto from the dollars whose value does not, and for anyone underwriting this market, that line is the whole game. The tokens that broke shared one trait: each was pegged to a dollar but backed by a single sponsor's volatile, leveraged securities. The tokens that held, tokenized treasuries, regulated savings, fully reserved dollars, were backed by assets that do not move with the crypto market. A dollar is only as steady as what sits behind it, and "made to feel like cash" is not the same as "backed by cash." That difference is invisible while prices rise and unmistakable on a day like June 5. We will give STRC, and the wider question of treasury-company paper becoming on-chain collateral, their own report; here it is simply the clearest reminder in months that what a token holds in reserve, not the size of its advertised yield, is what an allocator is really underwriting.

One limit is worth stating. The STRC-linked breaks stayed contained to those tokens; they did not cause the week's broader supply contraction, which is a separate, longer-running move. Treating a niche failure as a systemic one would be its own mistake. The signal is qualitative: this was the first real stress test of the company-preferred-as-dollar model, and it did not pass cleanly.

While the yield market was being tested, the infrastructure layer did the opposite of pause. On June 3, Mastercard extended its settlement capability to six regulated stablecoins, USDC, PYUSD, RLUSD, USDG, USDP, and SoFi's SoFiUSD, across eight blockchains, alongside new intraday, weekend, and holiday fiat settlement, a step toward what the network calls always-on settlement. The rollout is phased rather than switched on at once, with USDC first, and the initial partners are banks and processors, ARQ, CBW Bank, Cross River, Lead Bank, and Nuvei, rather than crypto venues. It is the settlement-layer answer to last week's question of whether the card networks would follow the consumer-distribution wave, and the answer is that the largest of them now intends to settle on stablecoins directly.

The consumer layer advanced in parallel, and a quieter pattern showed through it. MoneyGram launched MGUSD, an in-app self-custodial dollar to its more than 60M customers and roughly 500,000 retail locations, the second money-transmitter after Western Union to put a branded dollar in front of a remittance base. MGUSD is issued not by MoneyGram but by Bridge, the Stripe subsidiary, with infrastructure from M0 and Fireblocks. The same week, the payroll platform Deel launched DLUSD, a yield-bearing dollar paying up to about 4% on idle balances, built on the full Stripe stack of Bridge issuance, Privy wallets, and the Tempo chain, with Morpho as the yield engine. Two consumer dollars from two different brands, both issued and operated by Stripe underneath. As the card networks committed at the settlement layer, Stripe quietly consolidated the issuance-and-infrastructure layer behind other companies' dollars.

The most structural item of the week was also the least confirmed. CoinDesk reported, on anonymous sourcing, that Stripe, Visa, and Mastercard are close to a jointly operated stablecoin platform, with Coinbase exploring participation. Every named party declined to comment, and later reporting cautioned there may be no formal agreement yet. If it is real, a consortium of the two card networks and the largest payments processor jointly operating a dollar would be the most consequential rail development of the year; for now it is a well-sourced report, not a confirmed plan, and it belongs on the watchlist rather than in the ledger. Around the edges, tokenization kept widening its asset base: Securitize put Hamilton Lane's senior private-credit fund on TRON to reach that chain's deep USDT liquidity, and Bybit listed tokenized pre-IPO exposure beginning with SpaceX. The collateral arriving on-chain is no longer just Treasuries.

Washington's contribution this week was administrative rather than legislative, which is its own signal. On June 4, the House Financial Services Committee put all four federal banking regulators on the record on stablecoin implementation. The most concrete line came from the FDIC's Travis Hill, who said staff are "preparing to receive and process applications and developing supervisory processes" for stablecoin issuers, the GENIUS framework moving from statute into an operating pipeline. The Fed's Michelle Bowman reiterated that crypto firms' access to master accounts should stay tightly limited and that any access carries bank-equivalent anti-money-laundering obligations, and the OCC's Jonathan Gould defended the agency's national trust charters for crypto firms, including the contested application from the Trump-linked World Liberty Financial. The real work is happening at the level of supervisory plumbing even as the law sits still.

It sits still because CLARITY, the market-structure bill, did not move. It was placed on the Senate calendar but drew no floor time, the Senate Banking and Agriculture texts remain uncombined, and the conflict-of-interest provision is still a dealbreaker for Senate Democrats, with roughly eight weeks of legislative runway before the August recess. The one concrete federal action with a stablecoin nexus was enforcement: on June 2, the Treasury sanctioned Iran's largest exchange, Nobitex, and three others, citing their role in moving hundreds of millions of dollars in stablecoins for sanctioned entities. And the June 9 comment deadline on the GENIUS rulemakings, the FinCEN and OFAC anti-money-laundering rule, the FDIC issuer rule, and Treasury's state-regime rule, arrived just past the window; the early letters in hand are from trade groups, the Blockchain Association and the Bank Policy Institute, both pressing for uniform national standards over state-by-state discretion, with the heavyweight issuer letters still to land.

Outside the United States, the week reopened the question of who gets to distribute dollar stablecoins, and the drift was toward access. Japan's revised framework took effect on June 1, classifying qualifying foreign trust-type stablecoins as electronic payment instruments and opening regulated Japanese distribution to non-yen, dollar-denominated coins for the first time under an equivalence test; Circle is reported to be weighing an application. In the United Kingdom, the House of Lords Financial Services Regulation Committee published a report on June 3 urging the Bank of England to reconsider its proposed holding caps, about £20,000 per individual and £10M per business, and its requirement that systemic issuers hold at least 40% of reserves as unremunerated central-bank deposits, warning the regime as drafted would push issuers offshore. The Bank's deputy governor for financial stability called the current proposals "overly conservative," and the Bank's own revised draft, expected in June, had not landed by the close of the window.

The European posture is being relitigated too. The Commission's MiCA review, open through August, has put two questions back in play that matter directly for dollar issuers: whether to keep the de-facto ban on non-EU stablecoins, and whether to keep prohibiting interest on e-money tokens. The ECB's Isabel Schnabel used a June 1 speech to draw the sharpest official analogy yet, comparing stablecoin run-risk to the money-market funds of the 1970s and warning that reserve-quality differences and 24/7 redemption against T+1 reserve settlement are the fault lines to watch. The throughline across all three jurisdictions is that the regulatory perimeter around dollar stablecoins is loosening abroad at the same moment U.S. distribution is scaling, a tailwind for the dollar token that did not exist six months ago.

The week's risk events reinforced a pattern rather than breaking new ground. StablR's euro stablecoin EURR entered a third week off peg, mint and redemption still frozen; the issuer's June 5 update offered no make-whole plan, no confirmation that the roughly $13.5M of unauthorized tokens had been burned, and no evidence the compromised mint key had been rotated, leaving a MiCA-authorized issuer in open under-collateralization. The roughly $71M Aave frozen-ETH proceeding, the test of whether terrorism-judgment creditors can seize sanctioned-linked exploit funds ahead of a protocol's recovery, had its review hearing on June 5 and produced no public ruling; the question that matters for every protocol holding recoverable funds remains unresolved. And the bracketing incidents, the Gravity Bridge drain just before the window and the roughly $32M Humanity Protocol compromise just after it, were both private-key and bridge-admin failures rather than contract exploits, extending the year's clear lesson that key custody, not code, is now the dominant failure mode. May's total exploit losses fell sharply, to roughly $68M to $82M depending on the tracker, but the composition kept tilting toward operational compromise.

Against that, the quieter work of hardening continued. Anchorage Digital was named collateral manager for Ethena's institutional lending on June 2, moving borrower collateral into regulated off-chain custody with automated margining: the kind of unglamorous, do-it-right custody work the rest of the week kept arguing for.

For three weeks this briefing followed the contest over stablecoins moving down the stack, from the reserve float to the settlement rail to who reaches the user. This week the rate cycle cut across all of it with a blunter question: when cash out-yields the chain and crypto sells off, which dollars keep paying? The answer was clean. The tokens whose value rode on a single sponsor's volatile stock broke, one of them by nearly a tenth, in a single session. The tokens backed by Treasuries, regulated savings, and full reserves did not move at all. And the payment rails, whose value never rode on yield in the first place, kept advancing as though the selloff were someone else's problem.

For an institution putting money to work here, the lasting lesson is not to back away from yield. It is that what a dollar holds in reserve, and whether that reserve is insulated from the price of crypto, matters more than its advertised rate or the brand on the app. The spring was a contest over distribution. This week was a reminder that distribution decides who reaches the user, while the quality of the reserve decides who is still paying a dependable yield after a bad week. The rails will keep getting built. The yields left standing after this rate cycle will be the ones that were built to survive it.

• Strategy's shift of STRC to semi-monthly dividends, approved June 8 just past the window, and whether it dampens the below-par drift; the broader treasury-company-preferred-as-collateral complex as it scales.
• Whether the reported Stripe, Visa, and Mastercard stablecoin consortium is confirmed, and on what structure and timeline.
• The June 9 GENIUS comment deadline and the issuer letter wave (Circle, Coinbase, Tether, Anchorage, Paxos) that had not yet surfaced.
• Whether the second-week supply contraction extends or the June 8-9 bounce holds, and the USDS/DAI reconciliation across trackers.
• The path of rate-cut expectations into the June 16-17 FOMC, Kevin Warsh's first signal on stablecoins or master accounts, and what a firmer front end does to on-chain yield demand.
• The Bank of England's revised systemic-stablecoin draft and whether it softens the 40%-deposit and holding-cap design after the Lords report.
• Ethena's net-of-fee yield and USDe supply as perpetual funding resets after the selloff.
• MegaETH's second MEGA buyback against the June 23 unlock.
• StablR remediation and whether EURR repegs; any ruling in the Aave frozen-ETH proceeding.
• Ondo under Ian De Bode: roadmap continuity, with Ondo Perps slated for June 9, and whether the OUSG methodology gap closes.
• The Humanity Protocol post-mortem and whether the key-management failure pattern draws a supervisory response.