The European Central Bank has drawn a clear line in the sand. At an informal meeting in Nicosia, Cyprus on May 22, the ECB rejected proposals to relax liquidity and reserve requirements for euro-denominated stablecoins, arguing that softer rules would weaken banks and threaten financial stability across the eurozone.

The rejection lands at a moment when the broader stablecoin market sits at roughly $300 billion in total value. Euro stablecoins, including Circle’s EURC, the largest of the bunch, account for just 0.3% of global supply.

What the ECB is protecting, and from what

ECB officials, led by President Christine Lagarde, laid out a straightforward concern: if stablecoin issuers don’t have to park substantial reserves with traditional banks, money flows out of the banking system. That’s disintermediation, the process where deposits leave banks and land somewhere regulators have less control over.

The downstream effects are real. Banks with fewer deposits face higher funding costs. Higher funding costs mean tighter lending. Tighter lending makes it harder for the ECB to transmit its interest rate decisions into the real economy.

Lagarde had already telegraphed this thinking in a May 8 speech, where she highlighted the risk of “runs” on multi-issuer stablecoin setups and expressed a clear preference for DLT-enabled tokenized bank deposits over private stablecoin solutions. The Nicosia meeting essentially formalized that position into a policy stance.

The proposals the ECB shot down were inspired by recommendations from the Bruegel think tank, a Brussels-based economic policy group. Bruegel had argued that relaxing rules could actually strengthen the euro’s global standing relative to the US dollar, particularly given how thoroughly USD stablecoins dominate the market right now.

MiCAR’s existing framework sets the baseline

The EU already has one of the most comprehensive stablecoin regulatory regimes on the planet. The Markets in Crypto-Assets Regulation, known as MiCAR, has been in effect since 2024. It requires stablecoin issuers to hold 30% of their reserves with banks. For larger issuers, that figure jumps to 60%.

Those requirements are specifically designed to keep the banking system in the loop. Every euro held in reserve at a bank is a euro that stays within the traditional financial system, available for lending and subject to monetary policy transmission. The Bruegel proposal would have loosened those tethers. The ECB said no.

The digital euro and what comes next

The ECB isn’t ignoring digital currencies entirely. The institution has been developing a digital euro, a central bank digital currency anticipated for launch in 2029. In the ECB’s vision, this would serve as the eurozone’s answer to the stablecoin boom, one fully controlled by the central bank rather than private issuers.

There is one wild card worth watching. A European bank consortium called Qivalis plans to launch a euro stablecoin later in 2026. This matters because it fits neatly within the ECB’s stated preference for bank-issued solutions over those from pure crypto firms.