The Mexican peso (sign: $; code: MXN) is the currency of Mexico. Modern peso and dollar currencies have a common origin in the 15th–19th century Spanish dollar, most continuing to use its sign, "$".

The Mexican peso is the 8th most traded currency in the world, the third most traded currency originating from the Americas (after the United States dollar and Canadian dollar), and the most traded currency originating from Latin America

Source: Wikipedia