Stablecoin FX below interbank rates in Q2; routing raised costs

Borderless.xyz's Q2 2026 Benchmark shows stablecoin cross-border foreign exchange traded below the interbank mid rate in each month of the quarter. The report, using pricing from 260 payment corridors across 108 countries, records a median Parity Gap of negative 3.2 basis points for Q2 and a low of negative 5.9 basis points in June. The Parity Gap measures the difference between delivered stablecoin pricing and the interbank mid rate; a negative value means delivered prices landed below the interbank mid.

The dataset indicates the gap first moved below zero in February and generally deepened through June. The benchmark reflects all-in client pricing rather than isolated FX execution because some providers embed fees in quoted rates.

Delivery costs showed limited change in Q2. The typical cost to move $10,000 across corridors was about $27, and that figure stayed within roughly 30 cents for five straight months. Median spreads, defined as the difference between a provider's buy and sell prices, held at about 98.8 basis points from March after most compression occurred in the first quarter.

The report attributes stable delivery pricing to frequent changes in the lowest-cost provider on many corridors. Where the cheapest provider rotates often, aggregate prices tend to settle near a market-clearing level.

The report quantifies a “Routing Tax” tied to provider choice. Firms that route payments through a single provider typically pay the network median over time, which adds about $2,330 per $1 million compared with the best available price. On busy corridors the cheapest quote moves frequently: on the Brazilian real corridor the cheapest USDT provider changed 34 times in 88 days, roughly every 2.6 days, and no single firm held the top spot for more than half the quarter.

Asset selection produced corridor-level variation. At the network level USDC and USDT were priced about 0.4 basis points apart, but differences by corridor were substantial. In Peru USDC consistently traded at roughly a 99 basis point discount to USDT.

The report compares routing gaps across countries to show how volume interacts with price dispersion. Mexico registered a 21.5 basis point routing gap on roughly $67.6 billion of annual remittance inflows. Colombia posted a 122.8 basis point gap on about one-sixth of that volume, implying similar total leakage between the two markets given their different sizes.

Regional figures diverged. Africa's median spread widened 166 basis points to 512.8 basis points for the quarter. Latin America's median spread compressed to 89.0 basis points, and Asia's remained near 6.1 basis points. Two African corridors accounted for substantial movement: Malawi saw a single repricing on April 9 that pushed its typical spread from about 296 basis points to 1,975 basis points; the route had no backup provider, so the new price persisted. Ghana's USDC route experienced a spread widening of 992 basis points between the quarter's first and last weeks; multiple providers remained active there, keeping the best available quote around 258 basis points inside the median on a typical day.

Borderless's figures are network-level medians, and actual costs for any payer will depend on specific corridors, transaction sizes and choice of providers. Earlier Borderless analysis found that in parts of Latin America and East Africa stablecoin FX prices had approached parity with bank rails.