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VOL. I · EST. 11.2025 
SatyaDheesh
सत्याधीश
India's Ground Truth Record
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In its weekly report, Nuvama Institutional Equities noted that BSE’s index option

GS3Economy · S&T · Environment · Security· Capital markets & SEBI· Prelims·

Why in news

BSE index option premium volumes declined due to investor concerns over the newly introduced Closing Auction System (CAS) and subsequent regulatory actions by SEBI.

Background

Nuvama Institutional Equities reported a 14% drop in BSE index option premium volumes to Rs 15,600 crore. SEBI issued an interim order against Copthall Mauritius Investment Limited and Mansi Share and Stock Broking Private Limited for manipulative trades during CAS sessions.

Facts for Prelims

  • FactBSE index option premium volumes dropped 14% to Rs 15,600 crore by the week ending Friday.
  • BodySEBI (Securities and Exchange Board of India) is the primary regulator of the securities market in India.
  • FactAverage daily contracts fell by more than 8% during the reporting period.
  • FactThe Closing Auction System (CAS) began implementation on August 3.

For Mains

Q. Discuss the challenges and regulatory requirements associated with implementing a Closing Auction System in capital markets to ensure transparency and prevent market manipulation.

Dimensions to cover in your answer

  • market liquidity impact
  • regulatory oversight by SEBI
  • investor confidence and transparency
  • technological infrastructure for real-time monitoring

Keywords: market manipulation · regulatory oversight · liquidity · transparency · capital markets

Read the full news →Report a mistake in this noteSource: Economic Times ↗Also: GS2 · Transparency, accountability & RTI

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