Oil refiner shares extend losses after tax hike

Reuters Market Eye - Hindustan Petroleum Corp Ltd slumps 6.28 percent, while Bharat Petroleum Corp Ltd drops 4.55 percent.

Indian Oil Corp falls 4.43 percent.

India has raised factory gate tax on petrol and diesel.

September-quarter results of BPCL and IOC also weigh.

(Reporting by Abhishek Vishnoi)