India, Dec. 3 -- The Indian Rupee weakened past the psychologically crucial 90 per US dollar mark, as delays over a India-US trade deal weighed on sentiment.

The rupee weakened to a low of 90.13 per US dollar on Wednesday, eclipsing its previous all-time low of 89.9475 hit on Tuesday. It was last down 0.3% on the day. The lack of forceful intervention by the Reserve Bank of India (RBI) and persistent foreign outflows contributed to the loss, according to analysts.

"Exporters are not selling dollars aggressively since the rupee is depreciating, while the dollar demand from importers remains high," Ritesh Bhansali, deputy chief executive officer at Mecklai Financial Services, told Bloomberg News.

Only a India-US trade deal is likely to p...