The Blue Dollar: Parallel Exchange Rates

How currency controls created an informal "blue" dollar market in Argentina with prices far above the official rate, and why multiple exchange rates distort the economy.

When governments restrict buying dollars, parallel markets appear.

The cepo

Argentina imposed currency controls (the cepo) in 2011-15 and again from 2019.

The blue dollar

The dólar blue is the informal exchange rate on the street.
At times, it was around double the official rate.
Exchange houses called cuevas (“caves”) traded dollars.

Many rates

Argentina had multiple official dollar rates for tourists, card spending, savings and exporters, like the “Coldplay dollar” for concert-related payments and the “soy dollar” for exporters.

Distortions

Exporters received less at the official rate, discouraging exports.
Importers with access to official dollars gained windfalls.
Tourists used the blue rate or special rates, making Argentina cheap.
Corruption in allocating official dollars.

Unification

In December 2023, the Milei government devalued the peso sharply, and by April 2025 lifted most currency controls, narrowing the gap.

Lesson

Price controls on currencies create shortages and black markets, like controls on any good.

The tourist's trick

A tourist in Buenos Aires exchanges dollars at the blue rate, getting nearly twice as many pesos as the official rate, making meals very cheap.

Thinking an official exchange rate reflects true value

Controls kept the official rate far below the market rate.

Key takeaways

Currency controls (the cepo) created the blue dollar.
The blue rate was sometimes double the official rate.
Multiple rates distorted trade and invited corruption.
Controls were largely lifted by April 2025.