The Bombay Stock Exchange (BSE) on March 18, 2026, issued a notification regarding the change in Methodology of the BSE Sensex 1X Inverse Daily Index and the BSE Sensex 2X Inverse Daily Index.
The following has been stated: -
•BSE Sensex inverse indices methodology has been revised effective April 01, 2026.
•Core calculation (inverse of total return including dividends) remains unchanged.
•Key change: interest adjustment now accounts for net impact after deducting borrowing costs of underlying securities.
•Formula updated by modifying the interest component factor, refining the accuracy of daily inverse returns.
[Notification No.: 20260318-30]
