3 weeks ago
NSE-BSE price gaps spark debate over new closing mechanism
In India, there are two big stock exchanges where people buy and sell parts of companies.
They are called the NSE and the BSE.
The government's market regulator, SEBI, introduced a new way of deciding the official closing price for the day, called the Closing Auction Session.
Right after it started, the two exchanges sometimes gave different closing prices for the same company.
For example, one company closed higher on one exchange but lower on the other.
Many investors were confused and wrote about it on social media.
Some big foreign investors liked the new system because it matches how markets work in other countries.
But many Indian banks, brokers, traders and exchanges were worried about it from the start.
They said India's markets do not have enough buyers and sellers to make the new system work well.
The debate is about whether the new closing prices can be trusted.
SEBI's new Closing Auction Session (CAS) has produced noticeable differences in closing prices between the NSE and BSE, sparking debate among market participants.
Investors took to social media to question the reliability of end-of-day price discovery after sharp divergences in official closing prices.
Global passive investors were the strongest supporters of CAS, wanting India's market structure to align with international practices and reduce tracking error.
Domestic institutions, brokers, traders and exchanges had reservations, arguing Indian markets lack the institutional depth and two-sided liquidity needed for auction-based closing.
On Tuesday, Trent, Bharat Electronics Ltd and Bajaj Finance all closed with differing prices and returns on the BSE versus the NSE.
- Who
- Securities and Exchange Board of India (SEBI), investors, global passive investors, and domestic institutions, brokers, traders and exchanges.
- What
- A debate over divergences in NSE and BSE closing prices following implementation of the new Closing Auction Session (CAS) mechanism.
- Where
- India, across the National Stock Exchange (NSE) and BSE, with the report datelined Mumbai.
- When
- After the first few trading sessions under the new framework, including Tuesday when specific price divergences were observed.
- Why
- Global passive investors wanted India's market structure to align with international practices and reduce tracking error, while domestic participants argued the market lacked the depth and liquidity for reliable auction-based closing.
Supporters (Global Passive Investors)
Opponents (Domestic Market Participants)
Adoption of the Closing Auction Session
Supporters (Global Passive Investors)
Supported CAS to align India's market structure with international practices, enabling trades at the same prices used for benchmark index calculations and reducing tracking error.
Opponents (Domestic Market Participants)
Reserved during the consultation phase, arguing Indian markets lacked the institutional depth and two-sided liquidity required for an auction-based closing mechanism to deliver efficient and reliable price discovery.
Key facts
- Mechanism
- Closing Auction Session (CAS), introduced by SEBI
- Trent closing price (Tuesday)
- BSE Rs 3,070 (+1.15%); NSE Rs 3,107.70 (+1.89%)
- Bharat Electronics Ltd (BEL) closing price (Tuesday)
- BSE Rs 392 (+0.94%); NSE Rs 391.50 (-0.17%)
- Bajaj Finance closing price (Tuesday)
- BSE Rs 1,153 (+1.06%); NSE Rs 1,149 (-0.35%)
- Main supporters
- Global passive investors and foreign funds
- Main opponents during consultation
- Domestic institutions, brokers, traders and exchanges
- Opposition rationale
- Lack of institutional depth and two-sided liquidity in Indian markets







