The rupee struggled to remain firm on Tuesday, but the US dollar appreciated in the interbank market for the second day in a row. The State Bank of Pakistan (SBP) reported the dollar gained 17 paise to settle at Rs278.29 compared to Rs278.12 a day before. The greenback appreciated by 18 paisa on Monday. “The exchange rate is stable. The minor fluctuations have no significance,” said Atif Ah