India, Oct. 29 -- The Sensex and Nifty opened flat but in positive territory on Thursday, with investors tracking elevated crude oil prices, geopolitical tensions and the US Federal Reserve's policy decision after benchmark indices declined in the previous session.

The BSE Sensex opened at 73,340.78, up 94.75 points, or 0.13%. The NSE Nifty 50 stood at 22,729.45, gaining 30.60 points, or 0.13%.

The muted opening followed a volatile session on Wednesday, when the Sensex fell 352.64 points, or 0.48%, to close at 73,246.03. The Nifty declined 50.90 points, or 0.22%, to settle at 22,698.85.

Selling in heavyweight stocks, particularly Reliance Industries and information technology (IT) companies, dragged benchmark indices lower on Wednesday...