SEBI issues ex-parte interim order over Sensex expiry market manipulation
This is an ex-parte interim order by SEBI regarding alleged manipulative trading during the Closing Auction Session (CAS) on the BSE Sensex weekly expiry day of August 13, 2026. SEBI examined abnormal price spikes and trading patterns to determine if the market was manipulated.
Copthall Mauritius Investment Limited, Mansi Share and Stock Broking Private Limited
- SEBI observed three significant price spikes in the Sensex Indicative Equilibrium Price (IEP) during the CAS on August 13, 2026, including a 362.02-point rise in 2 seconds and a 405.08-point rise in 28 seconds.
- Copthall Mauritius Investment Limited accounted for 86.6% of the gross buy value in Sensex constituents during the CAS.
- Mansi Share and Stock Broking Private Limited cancelled 99.06% of its sell orders (12,65,000 out of 12,77,000 shares).
- Copthall cancelled 32.79% of its buy orders (10,38,201 out of 31,66,651 shares).
- SEBI calculated 'wrongful gains' for both entities, though the specific monetary amounts are not detailed in the provided text excerpt.
- The order is issued under Sections 11(1), 11(4), and 11B(1) of the SEBI Act, 1992.
Written from the document by AI, and checked against it. The original below is authoritative.
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Document details
| Official title | Ex-Parte Interim Order in the matter of manipulative trades during CAS on SENSEX expiry at BSE- August 13, 2026 |
| Source body | Securities & Exchange Board of India (SEBI) — enforcement orders |
| Reference number | WTM/KV/ISD/ISD-SEC-6/32673/2026-27 |
| Status | None (order) |
| Year | 2026 |
| Closing date | — |
| Documents | 1 |