Description

Special Pre-Open Session on October 14, 2025 for price discovery of Tata Motors post-demerger. TML Commercial Vehicles Limited to be added to multiple BSE indices at zero price effective October 14, 2025.

Summary

BSE will conduct a Special Pre-Open Session (SPOS) on Tuesday, October 14, 2025 to enable price discovery for Tata Motors Limited (ticker: 500570, TATAMOTORS) following its demerger. Effective from the same date, the newly demerged entity TML Commercial Vehicles Limited will be added to 27 BSE indices at zero price after close of October 13, 2025, without divisor adjustment.

Key Points

  • Special Pre-Open Session scheduled for October 14, 2025 for Tata Motors Limited price discovery post-demerger
  • TML Commercial Vehicles Limited to be added to 27 BSE indices including BSE SENSEX
  • Addition will occur at zero price after close of Monday, October 13, 2025
  • No divisor adjustment will be made for the index additions
  • Tata Motors ticker: 500570 (TATAMOTORS)

Regulatory Changes

No regulatory changes. This is a corporate action implementation circular.

Compliance Requirements

  • Market participants must prepare for Special Pre-Open Session on October 14, 2025
  • Index tracking funds and portfolios need to adjust holdings to reflect the addition of TML Commercial Vehicles Limited
  • Queries should be directed to bseindex@bseindia.com

Important Dates

  • October 13, 2025 (Monday): Last day before TML Commercial Vehicles Limited addition to indices (close of trading)
  • October 14, 2025 (Tuesday): Special Pre-Open Session for Tata Motors Limited price discovery; effective date for TML Commercial Vehicles Limited addition to BSE indices

Impact Assessment

Market Impact: High - affects 27 BSE indices including flagship BSE SENSEX, BSE 100, BSE 200, and BSE 500. All index-tracking funds and passive investment products will need rebalancing.

Trading Impact: Special Pre-Open Session required for price discovery indicates significant expected volatility and market interest in post-demerger valuations.

Investor Impact: Shareholders of Tata Motors Limited will receive shares in TML Commercial Vehicles Limited. Index inclusion ensures liquidity for the demerged entity from day one.

Indices Affected: BSE SENSEX, BSE 100, BSE 200, BSE 500, BSE AUTO, BSE INDIA MANUFACTURING INDEX, BSE ALLCAP, BSE CONSUMER DISCRETIONARY, BSE LARGECAP, BSE SENSEX 50, BSE 100 ESG INDEX, BSE 250 LARGEMIDCAP INDEX, BSE ENHANCED VALUE INDEX, BSE 100 LARGECAP TMC, BSE SENSEX SIXTY, BSE SENSEX SIXTY 65:35, BSE 200 EQUAL WEIGHT, BSE PREMIUM CONSUMPTION, BSE SELECT BUSINESS GROUPS, BSE SENSEX EQUAL WEIGHT, BSE INDIA SECTOR LEADERS, BSE 1000, BSE 1000 MULTICAP EQUAL SIZE WEIGHTED (25%), BSE 500 ENHANCED VALUE 50, BSE INDIA 150, BSE LARGEMIDCAP, BSE SENSEX 50 TMC.

Impact Justification

Major corporate action involving BSE Sensex constituent and addition of demerged entity to 27 BSE indices including flagship indices. Special trading session required for price discovery affects broad market participants.