Nairobi to Pumwani Division in terms of boundaries. Nairobi is divided into seventeen constituencies and eighty five wards, mostly named after residential estates. Kibera Division, for example, includes Kibera (Kenya's largest slum) as well as affluent estates of Karen and Langata. Nairobi is home to the Nairobi Securities Exchange (NSE), one of Africa's largest. The NSE was officially recognised as an overseas stock exchange by the London Stock Exchange in 1953. The exchange is Africa's 4th largest in terms of trading volumes, and 5th largest in terms of Market Capitalization as a percentage of GDP. Nairobi is the regional headquarters of
Nairobi passengers from Syokimau to the city centre cutting travel time by half. Opening of the station marks the completion of the first phase of the Sh24b Nairobi Commuter Rail Network that is geared at easing traffic congestion in Nairobi, blamed for huge economic losses. Other modern stations include Imara Daima Railway Station and Makadara Railway Station. The new Mombasa-Nairobi Standard Gauge Railway connects the port city of Mombasa and Nairobi. The new railway line has replaced the 1900 metre-gauge railway. The Nairobi Terminus is located at Syokimau, some 20 km from the city centre. Passengers travelling from Mombasa are usually