An exchange rate regime is a way a monetary authority of a country or currency union manages the currency about other currencies and the foreign exchange market. It is closely related to monetary policy and the two are generally dependent on many of the same factors, such as economic scale and openness, inflation rate, the elasticity of the labor market, financial market development, and capital mobility.
There is no correct or optimal exchange rate. However, the exchange rate has distributional consequences with winners and losers in the domestic economy. Exporters and importers lose with currency appreciation while consumers and domestic oriented industries benefit from currency appreciation. A currency depreciation has the opposite effect.