This dataset is a market activity dataset, representing the combination of provincial-level 'magnetite ore' markets within the Southwest region of China, i.e., the 'magnetite ore' market group for the Southwest region. Transport losses, transport vehicles, and transport infrastructure are not included in this dataset; these elements are covered in the respective provincial market datasets. The Southwest region of China includes: Chongqing, Sichuan, Guizhou, Yunnan, and Xizang. Data sources include the China Communications Yearbook, China Energy Statistical Yearbook, China Statistical Yearbook, and customs statistics from the General Administration of Customs.