NY Fed: stablecoins tighten the trilemma in crises

A New York Fed staff report argues that dollar stablecoins are quietly eroding governments' grip on cross-border money, and that the effect shows up hardest during crises, per Staff Report no. 1202, published in August 2026. Read the label first: this is research by Fed economists reflecting their own views, not a Board regulation, GENIUS Act text, or supervisory guidance. It neither bans nor blesses stablecoins.

What the paper measured

The authors, Pablo Azar, Maryam Farboodi and Nish Sinha, built a dataset that links geotagged Ethereum Name Service registrations to on-chain stablecoin transactions, then lined those up against real episodes of banking restrictions, currency crises, sanctions and monetary disruption. The window is nine crisis episodes across eight countries from 2021 to 2025, including Argentina, Egypt, Iran, Myanmar, Nigeria, Russia, Turkey and the United Kingdom, and roughly 4.5 million wallet-event-week records. The finding is direct: wallets tied to a crisis country receive noticeably more USD stablecoins in the weeks a crisis breaks.

The number the abstract carries

Per CryptoSlate's read of the paper, the probability that a crisis-country wallet receives stablecoins rises about 1.8 percentage points during a crisis week, with sending activity picking up roughly 1.3% about two weeks later. Those look like small coefficients until you set them against what capital controls are supposed to do, which is stop exactly this. The point is not the size of any single move; it is that the inflow reliably switches on at the moment a government most wants it off.

Why this tightens the trilemma

Here is the mechanism, and it is the paper's real claim. The Mundell-Fleming trilemma holds that a country cannot keep a fixed exchange rate, free capital movement and independent monetary policy all at once, and must give up one of the three. Capital controls are how governments try to reclaim policy autonomy by clamping capital movement. Programmable stablecoins, the authors argue, make capital mobility endogenous: residents can move dollars peer-to-peer faster than controls can adapt, so the clamp leaks precisely when it is needed most. That does not repeal the trilemma, but it makes the fixed-rate-with-policy-autonomy corner more expensive to defend.

The takeaway

Read this as an early-warning input, not a verdict. If you track emerging-market policy or the stablecoin regulatory fight, the usable signal is that on-chain dollar demand now spikes measurably at the start of a crisis, which turns stablecoin flows into a real-time stress gauge that runs ahead of official reserves data. Watch whether policymakers cite work like this to argue for on-chain surveillance or transfer limits, because that is where staff research becomes rulemaking pressure. The paper does not tell a central bank what to do; it tells you where the next control fight lands.

For related regulatory and market context, see our coverage of Treasury's GENIUS Act stablecoin rules, the SEC custody-rule rewrite in White House review, and BitGo's $42.5M buy of NYDIG's trading arm.