New Delhi, Sept. 8 -- Indian benchmark indices remained under pressure on Tuesday, September 8, with the Sensex and Nifty declining up to 0.5% as fresh Middle East geopolitical tensions, elevated crude oil prices and renewed concerns over a possible US Federal Reserve rate hike weighed on sentiment.

The Sensex was down 436 points, or 0.56%, to its intra-day low of 75,697.02, while the Nifty declined 122 points, or 0.5%, to day's low of 23,657.15.

The weakness came on Nifty expiry day, making the session particularly important for traders as volatility can rise around the expiry of index derivatives. At the same time, institutional selling added to the pressure on the broader market.

Rising crude prices and renewed risks of a widening M...