Foreign exchange trading is a market where national currencies are valued and traded against each other. It is an abbreviation composed of the English word "foreign exchange". Foreign exchange is even shorter. It is the largest and most liquid financial market in the world. The euro, US dollar, pound sterling, Swiss franc, and Japanese yen are the largest trading parities in these markets.

The Canadian dollar, the Australian dollar, the Brazilian real, the South African rand, the Korean dollar and the Türkiye lira have also become the foreign exchange market trading products that are heavily traded with the global market.