Answer:
An increase in the value of currency is called appreciation.
Step-by-step explanation:
Increase in the value of a currency in relation to the other currencies.
The appreciation is the process contrary to depreciation, which involves the decrease in the value of a currency.
The appreciation of a currency can be produced by the increase of its demand in the currency market or as a consequence of monetary policy.
In the event that the exchange rate between the currencies is fixed, the rise of this exchange rate would be called revaluation.