The Malagasy Ariary (MGA) has served as Madagascar's official currency since 2005, regulated by the Central Bank of Madagascar (Banky Foiben'i Madagasikara). Its value is subject to economic conditions and global market forces, which can lead to fluctuations against other major currencies. As of my last knowledge update in January 2022, the exchange rate was approximately 3,800 MGA to 1 USD. While the Malagasy Ariary is primarily used for domestic transactions, it is not commonly traded on international foreign exchange markets. Madagascar hasmaintained its commitment to the Malagasy Ariary, and there were no prevalent plans to adopt a foreign currency at that time, reflecting the country's dedication to its own currency. Please note that exchange rates and policies may change, so it's advisable to consult current sources for the latest information regarding the Malagasy Ariary.