Reuters Market Eye - Essar Oil Ltd's shares slump as much as 6.4 pct to lowest since July 18.
Trades below proposed delisting floor price of 108.18 rupees.
Traders cite uncertainty about Essar's delisting procedure in light of new SEBI rules.
The securities regulator on Wednesday approved changes to insider trading and delisting rules.
Reporting by Abhishek Vishnoi