The Indian rupee slumped 27 paise to 72.99 against the US dollar in opening trade on Thursday, weighed down by a rebound in the US dollar and lacklustre opening in domestic equities. At the interbank forex market, the domestic unit opened at 72.99 against the US dollar, registering a fall of 27 paise over its previous close.

On Wednesday, the rupee had settled at 72.72 against the American currency.