MTR constructs and operates Hong Kong's rail network, giving it a monopoly position. In addition to rail operation, the company makes recurring income from commercial business in the stations. This includes rental of retail kiosks and advertisement in the stations and investment properties in shopping malls above stations. Residential real estate development forms part of MTR's return for the rail operation. In a normalized environment, average operating profit is approximately 20% in rail operation, 60% in station commercial and property leasing business, and 20% in property development. The Hong Kong government owns 75% of MTR.