Opposition candidate Mauricio Macri’s pledge to end Argentine currency controls should he win Sunday’s election just got harder after the central bank president vowed to stay on, criticizing any attempt to devalue the peso.

After years of enduring double-digit inflation and government interventionism, foreign banks in Argentina are hoping for a payoff with Sunday’s presidential election.

The best forecaster for the Mexican peso is a 36-year-old economist in Warsaw who says he barely keeps tabs on what’s going on in the Latin American country.