The rupee on Wednesday collapsed to a lifetime low of 72.88 against the dollar at the interbank foreign exchange market.
Escalating trade war concerns and consistent dollar demand from banks and importers, mainly oil refiners, following higher crude oil prices, kept the rupee under pressure, dealers said.
Brent crude gained 0.35 percent to quote at USD 79.34 a barrel. It had surged over 2 percent in Tuesday's trade.
Sentiment was also hurt by sustained capital outflows, they added.
Meanwhile, the benchmark Sensex was up by 133.29 points, or 0.35 percent, to 37,546.42 in the opening deals.
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