Cross-Currency Arbitrage

Cross-currency arbitrage is triangular. The desk combines legs such as an asset priced in country A's currency and country A's currency priced against country B's currency. Chained together, these legs form a synthetic FX pair that can be priced differently than the same pair in traditional FX markets. The desk hedges out the FX exposure and seeks to capture the difference.

The approach applies to any asset traded across jurisdictions and currencies, BTC is only one example. The intended spread only becomes comparable after the quote currencies are converted or hedged.

Illustrative structure

Suppose BTC can be bought in country A's currency, while the currency leg between country A and country B implies a different price than the traditional FX cross would suggest. A paired structure trades the two legs and then hedges or converts the resulting FX exposure to isolate the synthetic-versus-traditional difference.

The visible local-market premium is not the realized return. The calculation must include:

• the executable exchange rate between the two currencies;

• FX hedge or conversion costs;

• trading fees and market impact in each market;

• transfer, banking, custody, and settlement costs;

• the time during which the asset and currency legs can move independently.

Why the premium can exist

Local demand, capital controls, banking access, settlement speed, market hours, and uneven liquidity can cause the same asset to trade at different currency-adjusted prices. Those frictions can also prevent the spread from being captured.

Residual risks

Cross-currency arbitrage remains exposed to FX hedge mismatch, local-market liquidity, capital controls, banking or counterparty disruption, delayed settlement, trapped funds, partial fills, and price movement between legs.

Read Delta Neutrality for the hedge boundary and Market & Trading Risk for broader failure modes.