According to the Central Bank of West African States, the CFA franc trades at a strictly fixed rate of 655.957 to one euro. While most modern global currencies move every hour based on international supply and demand, this exact exchange rate has not changed by a single fraction since the euro was introduced in 1999. That is not an accident. It is the deliberate result of a currency peg -- a policy where a government legally guarantees the value of its money against a stronger, more stable foreign currency. For the fourteen African nations that use the CFA franc, this peg is the foundation of how their economies relate to the rest of the world.

The CFA franc is not one single currency union -- it is two. The West African Economic and Monetary Union (WAEMU) includes countries such as Senegal, Côte d'Ivoire, Mali and Togo, and is managed by the Central Bank of West African States. The Central African Economic and Monetary Community (CEMAC) covers countries including Cameroon, Gabon and the Republic of the Congo, managed by the Bank of Central African States. Both currencies are pegged to the euro at the same fixed rate, and both peg arrangements are backed by an unusual guarantee: the French Treasury provides an unlimited promise to support the peg if either zone ever ran short of reserves. In exchange, the participating central banks are required to keep a substantial share of their foreign exchange reserves parked in French Treasury accounts. The result is that a CFA franc in Dakar is worth exactly the same fraction of a euro as a CFA franc in Libreville, even though the two are technically different currencies issued by two different central banks.

For someone living in a CFA zone country, the peg's biggest everyday effect is price stability for imported goods. Imported medicine, machinery, and electronics are largely insulated from the sudden price swings that hit countries with floating currencies. A floating currency is one whose value is set by the market and can change daily -- sometimes sharply.

The stability the peg provides comes at a real cost. By tying their currency to the euro, CFA franc countries give up independent monetary policy entirely. Their central banks cannot freely lower interest rates to encourage local borrowing and job creation if their economy is struggling, and they cannot devalue the currency to make their own exports -- coffee, cocoa, cotton, oil -- cheaper and more competitive on world markets. In effect, these countries import the European Central Bank's monetary policy, whether or not it matches what their own economy needs at any given moment. The peg is not free. It is a trade: stability and predictability, in exchange for one of the most powerful tools any government normally has to manage its own economy.

This piece covers the basic mechanics -- what a peg is, how the CFA franc works, and what it means for everyday life. For readers who want to go further, The Meridian's Africa Desk has published a deeper analysis of whether the CFA franc arrangement still makes economic sense for all of the countries that use it, using the economic framework known as Optimum Currency Area theory. That piece builds directly on the basics explained here.