KARACHI: The dollar closed flat against the rupee in interbank and ended on a firm note in the open market, currency dealers said. Due to insignificant demand for import bills and dull demand from the corporate sector the greenback remained flat in interbank. The dollar closed at Rs 104.45 for buying and Rs 104.65 for selling. During the past week, the dollar stood flat or depressed in value against the rupee. The dollar traded at a low of Rs 104.44. The dollar’s rate differential between kerb and interbank markets increased by Rs 1.90 on average. Treasurers said due to comparatively lower-than-usual demand from the corporate sector, coupled with the central bank’s intervention, helped the rupee to stay firm. The euro lost 26 paisas in the interbank market to close at Rs 112.09 for buying and Rs 112.29 for selling. The pound sterling was down by one paisa to close at Rs 130.78 and Rs 130.98 for buying and selling respectively. Kerb Market: The rupee lost strength against the greenback on the open market after showing resistance in the interbank market, foreign exchange dealers said. The US dollar closed at Rs 107.43 for buying and Rs 107.63 for selling. It gained 03 paisas in the open market against the rupee. The demand and supply of dollar in the open market was normal but demand from general buyers remained firm, currency brokers said. The pound sterling closed up by 22 paisas and closed at Rs 133.72 for buying and at Rs 133.92 for selling against the rupee while euro closed at Rs 114.46 for buying and Rs 114.66 for selling. It gained 20 paisas on the kerb rate.