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20 August 2026

SEBI Closing Auction Session mechanism

The topic concerns the regulatory functions of SEBI, a statutory body, and its efforts to ensure market integrity and transparency, which are directly relevant to governance and economic regulation.

1 min read Day 2 of 3 2 questions 2 prelims

Notes

  • The Closing Auction Session (CAS) is a mechanism for determining stock market closing prices, replacing the previous Volume Weighted Average Price (VWAP) system.
  • SEBI asserts that the CAS mechanism provides enhanced capabilities for identifying and acting against market manipulation.
  • Market manipulation in the CAS involves placing large buy or sell orders that are subsequently cancelled to influence price discovery.
  • SEBI's regulatory threshold for price deviation in the CAS is set at a maximum of 3% from the reference price.
  • Manipulation tactics often involve placing orders significantly above or below the reference price to avoid losses or wrongfully profit from derivatives positions.
  • SEBI has initiated enforcement actions, including financial penalties, against entities found manipulating the CAS through order cancellation strategies.
  • SEBI is scheduled to release a study on retail and non-retail participation in the derivatives market for 2025-26.

Part of a longer story

This is day 2 of 3 in SEBI Closing Auction Session Implementation, which has been running since 18 August 2026. Reading it whole is usually worth more than reading today alone — the exam asks how something developed.

Questions

  1. Discuss the significance of the Closing Auction Session (CAS) in ensuring price discovery transparency in the Indian stock market. How does it differ from the traditional Volume Weighted Average Price (VWAP) method in terms of regulatory oversight? 150 words
    Attempt this — 150 words in 8 min
    0 / 150 words 8:00
  2. Market integrity is the cornerstone of investor confidence in the Indian financial ecosystem. In light of recent regulatory interventions by SEBI, analyze the challenges posed by order manipulation in automated trading systems and the role of the regulator in maintaining market stability. 250 words
    Attempt this — 250 words in 11 min
    0 / 250 words 11:00

Prelims

  1. What is the primary objective of the Closing Auction Session (CAS) introduced by SEBI?

  2. According to SEBI's regulatory framework for the Closing Auction Session, what is the maximum permissible deviation from the reference price?

Syllabus

Topics

Sources

250words.in · https://250words.in/daily/2026-08-20/sebi-closing-auction-session-mechanism