Ethena's shrinking dollar hits Nasdaq

Ethena’s synthetic dollar, USDe, has shed 70% of its supply since October. On Thursday, Wall Street took it public anyway: StablecoinX started trading on Nasdaq two days after the New York Fed published a paper explaining, in detail, exactly why that’s risky. Nobody on the deal mentioned the paper. Elsewhere, Japan turned into a two-front stablecoin fight, the Bank of England blinked on its caps, and a much smaller coin had a real depeg.

In this week’s brief:

• A shrinking synthetic dollar gets a Nasdaq ticker two days after the Fed explained why that’s dangerous

• Japan becomes a stablecoin battleground as Ripple and Circle both win regulatory footholds in the same week

• Plus Invesco’s reserve-fund sequel, a real depeg, and stablecoins built for AI agents

On June 25, StablecoinX closed its SPAC merger and began trading on Nasdaq the next day under ticker USDE, becoming the first public company built entirely around Ethena’s synthetic dollar, USDe. Two days earlier, the New York Fed’s Liberty Street Economics blog had published a paper on exactly how synthetic dollars like USDe amplified last October’s crypto deleveraging spiral once funding rates flipped negative. Great timing.

The shrinking part nobody mentioned: USDe’s circulating supply has fallen about 70% from its October 2025 peak of more than $14 billion to roughly $4.5 billion today. StablecoinX’s own announcement, and the executive quotes in it, don’t engage with that at all.

Why it’s not technically a stablecoin: USDe dodges the GENIUS Act’s ban on issuer-paid yield because its returns come from a delta-neutral basis trade (long crypto collateral, short an equal perpetual futures position) rather than interest on reserves. That’s the same mechanism the Fed paper says amplified October’s crash. The OCC proposed in March closing the loophole for issuer affiliates, but the draft still doesn’t clearly reach a structure like this one, where the yield comes from a market mechanism instead of a balance sheet. Germany’s BaFin didn’t wait around for that clarity: it already banned public USDe sales outright, calling it an unregistered security.

Who’s actually exposed: StablecoinX closed with roughly 24 million public shares and a $275 million ENA treasury, funded by an $893 million PIPE round split between cash and discounted ENA tokens. That means anyone with a Nasdaq brokerage account can now buy synthetic-dollar yield exposure with a stock ticker, a trade that used to require understanding perpetual futures funding rates.

By the numbers:

• 70%: USDe’s supply decline since its October 2025 peak

• $893 million: total PIPE investment backing StablecoinX’s public listing

• $275 million: StablecoinX’s ENA token treasury at closing, about 20% of ENA’s total supply

• 2 days: the gap between the Fed’s warning and StablecoinX’s Nasdaq debut

If funding rates turn negative the way they did last October, that fragility now plays out in an 8-K filing instead of a DeFi dashboard, and the PIPE investors who bought ENA at a discount are better positioned to absorb it than whoever bought USDE at Friday’s open.

• The Bank of England scrapped its proposed stablecoin holding caps, replacing £20,000 retail and £10M business per-person limits with a £40 billion per-coin issuance ceiling and a gilt reserve cap raised to 70%, after industry pushback and a House of Lords committee report.

• Hong Kong’s financial services chief told lawmakers regulated stablecoins remain on track for second-half 2026, with HSBC and the Standard Chartered-backed Anchorpoint Financial still the only two licensed issuers.

• Invesco filed its own tokenized stablecoin-reserve fund, joining BlackRock, State Street, and Fidelity in the reserve-manager land grab, with Superstate running the on-chain share registry.

• Circle published the technical spec for AI agents to pay each other in USDC without a human in the loop, built with Stripe and Tempo, supporting nanopayments as small as $0.000001 across EVM chains, Solana, and Stacks.

• Mosta launched MainUSD, a Brale-issued stablecoin live across more than 20 chains, built for human companies and AI agents as equal customers from day one.

• A much smaller stablecoin, MIM, slid toward $0.48, roughly half its peg, after weeks of liquidity withdrawals; Abracadabra responded by hiking interest rates across every Cauldron to force debt repayment.

• Ripple and SBI Group launched RLUSD in Japan on June 25 after it cleared the JFSA’s equivalence test as the country’s first Type 4 electronic payment instrument, though at $1.7B in market value it’s still a rounding error next to Tether and Circle. A day later, Circle signed an MOU with Nomura to chase Japan’s $440 billion corporate FX market with USDC, putting the two stablecoins in direct regulatory competition in the same country days apart.

• Chainlink and 47 South Korean and European banks launched Project Pangea, aiming to settle a $150 billion trade corridor in euro and won stablecoins instantly instead of the usual two-day FX cycle, using Chainlink to bridge the new rails with existing SWIFT and ISO 20022 systems.

• Nigerian stablecoin payments startup Daya, founded by Circle and Helicarrier alumni, raised a $2.4 million pre-seed round led by Hivemind Capital, with Lattice, Alliance, and Aptos Foundation participating, a small but real emerging-markets bet in a week dominated by Wall Street and Tokyo headlines.

• 📄 The NY Fed’s “Synthetic Stablecoins and Financial Stability”: the actual paper behind this week’s Big One. Essential if you bought USDE this week without reading past the press release.

• 📄 BIS’s annual report chapter “Anchoring trust in money: innovation beyond stablecoins”: argues current stablecoin designs lack “singleness,” the guarantee that different forms of money trade at exact par against central bank money, a critique that lands even harder on synthetic dollars than fiat-backed ones.

Wall Street spent the week proving it’ll list almost anything before it’ll read the fine print. Keep an eye on funding rates. See you next week.