USDC has officially overtaken Tether’s USDT in stablecoin trading against the euro, according to a new Kaiko report. USDC now accounts for 56% of stablecoin-to-euro trading, up from just 10% in January 2024, a stunning reversal driven by European Union regulation rather than market hype. If you hold stablecoins, the rules are quietly picking the winners, and that has direct consequences for your DeFi positions.
By Priya Sharma | October 27, 2026
The Hook: Europe’s Stablecoin King Just Changed
Stablecoins are tokens designed to hold a steady value, usually pegged to the US dollar, and they are the fuel of decentralized finance. For Europeans, stablecoin-to-euro trading pairs are the main on-ramp and off-ramp for entering and exiting crypto markets, as Kaiko described in its report, covered by Cointelegraph on Tuesday. That makes the question of which stablecoin dominates euro trading a big deal for liquidity, fees and safety.
Circle’s USDC now represents 56% of stablecoin trading against the euro, according to Kaiko data, up from just 10% in January 2024. USDC has also overtaken USDT in euro-denominated trading liquidity, with its order books now roughly 40% deeper than its rival’s. In practice, that means European traders can buy or sell USDC against the euro with less slippage, the hidden cost you pay when large orders move the price.
The Evidence: MiCA Did the Heavy Lifting
The shift accelerated after major exchanges restricted USDT trading for customers in the European Economic Area under the Markets in Crypto-Assets Regulation, better known as MiCA, the EU’s landmark crypto rulebook. The regulation favors stablecoins that are fully authorized in the bloc, and Circle did the compliance work early.
About two weeks ago, the European Banking Authority designated USDC as the EU’s first “significant e-money token” under MiCA, a classification that puts the stablecoin under direct EBA supervision and subjects its issuer to additional regulatory requirements. Translation: Brussels now watches USDC’s reserves and operations directly, which is uncomfortable for Circle but reassuring for users.
Keep the global picture in mind, though. Tether remains the larger stablecoin worldwide, with a circulating supply about 2.5 times that of USDC, according to Kaiko. This is a European story for now, not a global dethroning.
The Core Conflict: Regulation Picks Winners
Here is the tension nobody in DeFi likes to say out loud: the market did not choose USDC over USDT in Europe; regulators effectively did. The same dynamic may be coming to the United States. Kaiko noted that the US is taking a similar approach to stablecoin regulation under the GENIUS Act, raising the possibility that American exchanges could see the same shift in trading activity observed in Europe.
The timeline is already set. On October 21, the Office of the Comptroller of the Currency issued its first final rule under the law, establishing reserve and redemption requirements for stablecoin issuers under its supervision, effective January 18, 2027. Beginning in July 2028, US platforms will also face restrictions on offering stablecoins from issuers that do not meet the law’s approval requirements. The regulatory changes could favor Circle, which has pursued authorization in both Europe and the US. Tether has taken a different approach, launching a separate US-focused stablecoin called USAT.
What This Means for Your Wallet
If you trade or lend stablecoins in Europe, the practical effects are already here: deeper USDC-euro liquidity means cheaper entries and exits, and holding a fully authorized token reduces the risk of a sudden delisting on your favorite exchange. If you are outside Europe, watch the GENIUS Act timeline, because the same liquidity migration could hit US platforms after the 2027 and 2028 deadlines.
For DeFi users more broadly, concentration is the flip side of compliance. When one regulated issuer dominates a region’s liquidity, the ecosystem becomes more dependent on that issuer’s health and decisions. Diversification across authorized stablecoins, when available, remains sensible.
The Verdict
The euro flip is a milestone, not a funeral for Tether, which still dominates globally. But it shows how fast regulation can reshape onchain liquidity when exchanges are forced to choose sides. For retail investors, the lesson is simple: in stablecoins, regulatory status is now part of the investment case. The euro market just voted, and it voted for compliance.
The cryptocurrency market remains highly volatile. This article is for informational purposes only and does not constitute financial advice.
from 10% to 56% of euro volume since january 2024 and people still claim MiCA changed nothing. the kaiko data is pretty blunt
order books 40% deeper is the part that matters. slippage on size USDT/EUR orders used to be brutal before the EEA restrictions
56% from 10% in under two years. MiCA did what no marketing budget could ever do for circle lol
ja, and euro pairs matter more than people think. that is the actual on and offramp for EU users, so the volume share is real usage
exactly, this is a rails story not a branding win. whoever owns the euro pair owns the front door to european defi. books 40% deeper just makes the moat measurable
circle also built the euROC pipeline and hired compliance staff years early. MiCA opened the door, circle was already standing in it
circle got designated the first significant e-money token and people celebrate. being directly supervised by the EBA is a leash, not a trophy
the leash is the product tho. EBA supervision is exactly what an EU treasury desk needs before it can even touch the pair
EBA supervision as a leash is exactly why the institutions came. the leash is the product
coinbase backing was already a tailwind, miCA just sealed it. waiting for the usdt delisting wave across EU exchanges now
my exchange delisted usdt months ago and literally nothing broke. the panic articles were overblown
nothing broke because the big onramps had months to prep. the long tail venues still quoting usdt-eur are where the gaps show up
watch the small venues quote usdt-eur at stale prices then. thats where the free money and the traps both live now
the long tail is where retail actually gets burned on requotes. a 56% share means nothing if your venue still quotes the thin book
stale usdt-eur quotes on small venues is free money for anyone botting against the deep usdc book. that gap closes fast
the big venue delistings already ran. the long tail exchanges still quoting usdt-eur are the next domino
the delisting wave mostly already ran. next question is whether USDT-EUR books thin out slowly or gap overnight. a slow drain hurts the arb desks the most
slow drain is worse for the arb desks like you said but actually better for retail. gaps are how market makers recoup on requotes
better for retail until the long tail dries up and one issuer owns the whole queue. a single front door is its own tail risk
Viktor H. one issuer owning the queue is only scary if the EBA leash goes slack. as long as supervision stays that tight id rather have one deep compliant book than six thin ones
one deep compliant book still beats six offshore ones with stale quotes. eu retail learned that during the delisting wave the hard way
depth beats everything until the compliant book has a bad week and there is no offshore book left to route around. concentration is the trade everyone forgets
single front door risk is why the eba leash matters. the day supervision slips is the day 56 percent becomes a single point of failure for euro onramps
56% of euro stablecoin volume and books 40% deeper. circle didnt win marketing, it won the compliance queue
kaiko data or not, 56% of euro pairs with books 40% deeper means institutions tested both and stayed. flows dont lie, press releases do
imagine a 40 million dollar airdrop budget to move share when circle just filed paperwork instead. compliance is the cheapest marketing in finance
10 to 56 percent in under two years on regulation alone. compliance did the marketing without a single incentive farm