The Mass Transit Railway Corp (MTRC) has asked member banks of the Joint Electronic Teller Services (Jetco), the territory's largest network of automated teller machines, to install machines in MTR stations. The move will break Hang Seng Bank's 17-year monopoly in the MTR network. MTRC spokesman Claudia Ho Sin-ka said about 40 Jetco member banks had been invited to tender for the right to install machines. As a result, about 40 machines would be added to the MTR network, joining the 90 machines at present operated by Hang Seng Bank. Ms Ho said the invitation was confined to the existing network of 38 stations and did not include stops along the airport railway. Citibank general manager Sunny Cheung Yiu-tong said automatic teller machines (ATMs) in MTR stations were not very profitable, considering the limited revenue they could generate and the high investment and operational costs. The only revenue a bank can derive from an ATM is the transaction fee paid by other banks when their customers use the machine. The MTRC has not decided if it will invite other banks to open branches in its stations when Hang Seng Bank's franchise expires in 2000.