Businesses that are located in Caracas include service companies, banks, and malls, among others. It has a largely service-based economy, apart from some industrial activity in its metropolitan area. The Caracas Stock Exchange and Petróleos de Venezuela (PDVSA) are headquartered here. PDVSA, a state-run organization, is the largest company in Venezuela, and negotiates all the international agreements for the distribution and export of petroleum. When it existed, the airline Viasa had its headquarters in the Torre Viasa.