Mumbai:The rupee slumped 98 paise to 70.58 against the US dollar in opening trade on Monday, tracking weak opening in the domestic equity market and unabated foreign fund outflows.
Forex traders said, the US-China trade-related concerns weighed on the investor community and kept the pressure on the Indian rupee.
The massive decline in the Indian rupee was largely a knee jerk reaction to the slump in the Chinese currency after China's central bank allowed currency depreciation after the US decision to impose a new tariff on Chinese goods, they said.
The rupee opened weak at 70.20 at the interbank forex market and then fell further to 70.58, down 98 paise over its last close.
The rupee had settled at 69.60 against the US dollar on Friday.
However, easing crude oil prices and weakening of the American currency vis-a-vis other currencies overseas supported the local unit to some extent.