The rupee closed at 262.6 per dollar in the interbank market against a close of 255 on Thursday - a 9.61% drop, which was the biggest single-day dip, according to the central bank.

The rupee has been dropping to adjust to market based exchange rate after an artificial upper cap of the local currency was lifted.

(Reporting by Ariba Shahid in Karachi and Asif Shahzad in Islamabad; Editing by Jacqueline Wong)