Buying and selling goods or currencies across international borders at a profit is called:

1. Price differences across borders create an opportunity. 2. The same good can cost different amounts in two countries. 3. Buying and selling across international borders at a profit has a name. 4. This is known as arbitrage. _Source: OpenStax Principles of Macroeconomics for AP Courses 2e (CC BY 4.0), Ch 15 'Exchange Rates and International Capital Flows'_