The Nifty fell for a fifth session in six on Friday to post its worst weekly loss since July as oil explorers continued to slump after Brent crude prices slipped to below $63 a barrel.
The broader Nifty closed down 0.8 per cent. For the week it lost 3.7 per cent for its worst weekly performance since mid-July.
The benchmark BSE Sensex provisionally ended 0.9 per cent lower.
Shares of Gail (India) fell 4.5 per cent, while Oil and Natural Gas Corp and Reliance Industries slipped 3.28 per cent and 2.54 per cent, respectively.