Exotic currency pair

By convention, a pair carrying one of the heavily traded currencies on one side and a currency from a smaller, less liquid or more restricted market on the other. Common examples pair the US dollar or the euro with the Turkish lira, the South African rand, the Mexican peso, the Norwegian krone or the Singapore dollar. The boundary is a market convention rather than a classification, and desks disagree about it: several currencies are called exotic on one desk and grouped with the minors on another.

What the label describes is a set of dealing characteristics rather than a property of the country. Fewer institutions make prices, so the quoted spread is wider and moves about more through the day. Depth is concentrated in the hours when the local market is open and thins outside them. The interest rate difference between the two currencies is usually larger, which shows up as a bigger financing adjustment on positions held past the daily cut off, in one direction as a debit and in the other as a credit. And an intervention or a capital control decision applies to one side of the pair specifically.

The cost comparison is the thing most often underestimated. A spread of a few pips beside one of a fraction of a pip is not a small difference in a percentage sense, and the gap widens further outside the local session and around domestic events, exactly when a position is most likely to need closing. The published typical spread for such a pair is an average over a period, not a level available at any given moment.