receipts by exporters.
The benchmark six-month forward dollar premium payable in July concluded weak at 180-1/2-181-1/2 paise from Wednesday's close of 184-1/2-186-1/2 paise.
Far-forward contracts maturing in January also settled lower at 341-343 paise from 346-348 paise.
The RBI fixed the reference rate for the US dollar at 53.1445 and for euro at 71.9355.
The rupee fell back against the pound sterling to 83.58 from previous close of 83.27 and also turned negative to end at 72.19 per euro from 71.97.
It, however, edged up further against the Japanese yen to 56.74 per 100 yen from last close of 56.76.