Mumbai: The rupee traded in a narrow range and depreciated 4 paise to 85.72 against the US dollar in early trade on Monday, weighed down by elevated crude oil prices and the dollar index. Forex traders said while the rupee benefitted from the initial reaction to the RBI rate cut, the aggressive rate cut narrows the interest rate differential with global peers. At the interbank foreign exchange, the domestic unit opened at 85.61 against the greenback. In initial trade, it witnessed an earl