A band, not a peg: how Argentina holds its exchange rate under the IMF programme
Background
Argentina's currency is the peso, and the institution that issues it and sets monetary policy is the Central Bank. Under the Extended Fund Facility programme the Central Bank targets money aggregates calibrated to support disinflation and reserve accumulation, and keeps exchange rate flexibility within an exchange rate band system rather than a fixed peg. Rebuilding foreign currency reserves is a programme commitment: reserve purchases exceeded the mid-year target by US$4 billion, and annual reserve accumulation has reached US$16 billion.
In plain words
Exchange rate band — A system in which a currency may move freely only between a stated upper and lower limit.
Monetary aggregates — Measures of the money supply that a central bank can set targets for.