Dollex series of BSE indices

All BSE indices reflects the growth in market value of constituent stocks over the base period in rupee terms, a need was felt to design a yardstick by which these growth values are measured in dollar terms. Such an index would reflect, in one value, the changes in both the stock prices and the foreign exchange variation. This is facilitated by the introduction of a dollar-linked index in which the formula for calculation of index is suitably modified to express the current and base market values in dollar terms. The scope for dollar-linked index emerged from the background of Indian equity markets increasingly getting integrated with global capital markets and the need to assess the market movements in terms of international benchmarks. This dollar-linked index is useful to overseas investors, as it helps them measure their 'real returns' after providing for exchange rate fluctuations.
BSE presently calculates dollar-linked version of SENSEX and BSE-200. Dollex-30 was launched on July 25, 2001 whereas Dollex-200 on May 27, 1994. These indices were initially calculated at the end of the trading session by taking into consideration day's rupee/ US$ reference rate as announced by India 's Central Bank i.e. Reserve Bank of India .
BSE announced introduction of Dollex-100, a dollar linked version of BSE-100 index effective from May 22, 2006 and from this date onwards Dollex-30, Dollex-100 and Dollex-200 are calculated and displayed through BSE On-line trading terminals (BOLT) by taking into account real-time Re./US$ Exchange rate. The formula for calculating the index is:
Dollex =
Index Value (In local currency) * Base rupee-US$ rate


Current rupee-US$ rate