Change in BSE Power Index Methodology

NOTICE

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Change in BSE Power Index Methodology

MUMBAI, September 09, 2026: BSE Index Services Pvt. Ltd. (formerly Asia Index Pvt. Ltd.) announces the following methodology changes to the BSE Power Index. The upcoming scheduled reconstitution of BSE Power Index will be based on the new methodology.

1. Heavy Electrical Equipment
2. Power Generation
3. Integrated Power Utilities
4. Power – Transmission | Companies from BSE 500 universe belonging to the below list of basic industries are considered eligible for selection.
5. Heavy Electrical Equipment
6. Power Generation
7. Integrated Power Utilities
8. Power – Transmission
9. Power Trading
10. Power Distribution
11. Other Electrical Equipment | | - Market Coverage Eligible stocks are selected based on their average float-adjusted market capitalization rank, until a minimum market coverage of 90% of the average float-adjusted market capitalization per sector is achieved.

• Liquidity Companies must have a minimum trading frequency of 90% in the preceding six months.

• Buffers A buffer of 2% both for inclusion and exclusion in the index is considered to minimize the turnover. For example, a non-constituent is included in the index only if it falls within 88% coverage and an existing index constituent is not excluded unless it falls above 92% coverage. However, the buffer criterion is applied only after the minimum 90% float-adjusted market capitalization coverage is satisfied. To maintain a minimum count of 10 in the index, constituents are retained, and non-constituents are included based on their average float-adjusted market capitalization rank. | No Change | | - Constituent Weightings

The constituents are weighted by float-adjusted market capitalization. | - Constituent Weightings

The BSE Power Index employs a float adjusted market capitalization weighting scheme. At each quarterly rebalance, index constituents are weighted based on float adjusted market capitalization, subject to an individual stock weight cap of 33% and a basic industry weight cap of 30%. |

For any additional queries, clients are requested to reach out to bseindex@bseindia.com

About BSE INDEX SERVICES PRIVATE LIMITED

BSE Index Services Private Ltd (formerly Asia Index Pvt. Ltd.) is a wholly owned subsidiary of BSE Ltd, Asia’s oldest stock exchange and home to the iconic SENSEX index – a leading indicator of Indian equity market performance. BSE Index Services Pvt. Ltd aims to provide a full array of indices to global / domestic investors and calculates, publishes, and maintains a diverse family of indices.

About BSE

BSE is Asia’s oldest exchange and the world’s largest exchange in terms of the number of listed companies. BSE has been playing a prominent role in developing the Indian capital market and has successfully offered an efficient capital raising platform to many companies in India. The benchmark index of BSE, Sensex, is tracked by investors across the globe is also considered as a barometer for the growth of Indian Economy. BSE provides an efficient and transparent market for trading in equity, debt instruments, equity derivatives, currency derivatives, interest rate derivatives, mutual funds, stock lending and borrowing.

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September 09, 2026