# Block deals explained through a $300 million mistake

**URL:** https://tradingqna.com/t/block-deals-explained-through-a-300-million-mistake/185984
**Category:** Good reads
**Created:** [August 27, 2025, 5:48am UTC](https://tradingqna.com/t/block-deals-explained-through-a-300-million-mistake/185984 "2025-08-27T05:48:28Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![nithin\_kumrr](https://tradingqna.com/user_avatar/tradingqna.com/nithin_kumrr/32/48231_2.png) [@nithin\_kumrr](https://tradingqna.com/u/nithin_kumrr)
#### Post date: [August 27, 2025, 5:48am UTC](https://tradingqna.com/t/block-deals-explained-through-a-300-million-mistake/185984/1 "2025-08-27T05:48:28Z")

</div>

Clean Science dropped 7% last week after Avendus, the investment bank handling the promoter stake sale, accidentally punched extra shares in a block deal, creating huge volumes.

SEBI has since widened block deal rules after the episode. Read this Finshots article:

> **[Block deals explained through a $300 million mistake](https://finshots.in/archive/block-deals-explained-through-a-300-million-mistake-spark-avendus-clean-science/)**
>
> An explainer on block deals, and why a huge trading error pushed SEBI to change the rules associated with them.