ECB flags euro stablecoin bond risk

A stablecoin works like a digital chip that promises one euro back for every token, and the European Central Bank said on April 13 that wider use of euro stablecoins could ripple into government bond markets. (ecb.europa.eu) The bank’s April 2026 Macroprudential Bulletin looked at euro-denominated stablecoins classed as e-money tokens under the European Union’s Markets in Crypto-Assets Regulation, or MiCAR. It said the effect on sovereign bond demand depends on who issues the token, what sits in the reserve pool, and where the incoming money comes from. (ecb.europa.eu) Stablecoin issuers take in cash and park it in assets meant to stay safe and liquid, the financial equivalent of keeping change in a till that must be ready for instant refunds. The European Central Bank said MiCAR requires issuers to keep at least 30% of reserves with banks, rising to 60% for significant issuers, with the rest in low-risk liquid instruments such as sovereign bonds. (ecb.europa.eu) That means one euro moved into a stablecoin does not automatically become one euro of new bond demand. The European Central Bank said the “pass-through rate” can vary with reserve design, bank liquidity choices, and whether users fund purchases by moving money out of bank deposits or by selling other assets. (ecb.europa.eu) The warning lands while euro stablecoins are still tiny next to the dollar market. The European Central Bank said euro-denominated stablecoins were less than €350 million in July 2025, and about €395 million by mid-November 2025, while dollar stablecoins accounted for about 99% of global stablecoin supply. (ecb.europa.eu 1) (ecb.europa.eu 2) The European Central Bank framed the issue against the United States, where dollar stablecoins already hold large pools of Treasury-linked assets. Its April note said the euro-area market has been less studied because it is still nascent, but reserve buying and redemption pressure could still shift demand for euro-area sovereign debt as the market grows. (ecb.europa.eu) The same reserve structure that can support a peg can also transmit stress. The European Central Bank said MiCAR’s bank-deposit requirement can act as a liquidity buffer in a run by reducing forced asset sales, but it can also pass stress from a stablecoin redemption wave into the banking system. (ecb.europa.eu) That is part of a wider European policy push around digital money and market plumbing. In 2025, the European Central Bank said stablecoins were moving from the crypto fringe toward broader payment and settlement uses, raising questions about financial stability, payment systems, and monetary sovereignty. (ecb.europa.eu) For now, the European Central Bank is not describing a current bond-market shock so much as mapping the route one could take shape. Its conclusion was narrower and more mechanical: if euro stablecoins scale up, reserve rules and redemption behavior will help decide whether they become steady buyers of sovereign bonds or a source of selling pressure. (ecb.europa.eu)