The 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 13th most traded currency in the world, the third most traded in the Americas, and the most traded currency in Latin America. The current ISO 4217 code for the peso is MXN; prior to the 1993 revaluation (see below), the code MXP was used. The peso is subdivided into 100 centavos, represented by "¢". The name was originally used in reference to pesos oro (gold weights) or pesos plata (silver weights). The literal English translation of the Spanish word peso is weight. As of January 4, 2013, the peso's exchange rate was $16.5914 per euro and $12.7597 per U.S. dollar 
Money is any object or record that is generally accepted as payment for goods and services and repayment of debts in a given socio-economic context or country. The main functions of money are distinguished as: a medium of exchange; a unit of account; a store of value; and, occasionally in the past, a standard of deferred payment. Any kind of object or secure verifiable record that fulfills these functions can be considered money.
Money is historically an emergent market phenomenon establishing a commodity money, but nearly all contemporary money systems are based on fiat money. Fiat money, like any check or note of debt, is without intrinsic use value as a physical commodity. It derives its value by being declared by a government to be legal tender; that is, it must be accepted as a form of payment within the boundaries of the country, for "all debts, public and private". Such laws in practice cause fiat money to acquire the value of any of the goods and services that it may be traded for within the nation that issues it.