The 30 scrip index was launched by the BSE on January 2, 1986 with 1978/79 as the base year. It had closed that day at 549.43.
The composition of the index has undergone change many times. Only 11 of the original 30 companies continue to be part of the sensex.
(Published 31 December 2009, 15:46 IST)
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