Sao Paulo is a municipality in the Southeast Region of Brazil. The metropolis is an alpha global city (as listed by the GaWC) and the most populous city in Brazil, the Western Hemisphere and the Southern Hemisphere, besides being the largest Portuguese-speaking city in the world. São Paulo is considered the "financial capital of Brazil", as it is the location for the headquarters of major corporations and of banks and financial institutions. São Paulo is Brazil's highest GDP city and the 10th largest in the world, using Purchasing power parity.