Fragmented Stablecoin Liquidity Makes Trading Resemble FX Markets

Dollar stablecoins were designed to offer par value and instant cross-border transfers. But assets such as USDT and USDC have different issuers and operate across separate blockchains and DeFi liquidity pools. Differences in collateral structures, market depth and access conditions mean tokens nominally worth $1 are not always fully interchangeable. This fragmentation increases slippage, failed transactions and routing risks, with particularly significant implications for large payments and institutional onchain treasury management.

On April 18, 2026, Eco CEO Ryne Saxe said the stablecoin market had surpassed $320 billion, yet a single $10 million conversion could move the market and would need to be split and routed across venues. A March report from Borderless analyzed 66 fiat-conversion corridors spanning 33 currencies and seven blockchains in February. It found that 91% of USDC and USDT pairs had spreads below 10 basis points, although quotes from different providers could vary by several hundred basis points.