KARACHI, May 12 (EW): After Thursday’s historic decline in the Pakistani rupee’s value, the local unit gained Rs12.43 against the US dollar in a “dramatic twist” in early trading session on Friday. The dollar was being traded at Rs286.50 during the inter-bank trade around 10:15am. On Thursday, the dollar reached all-time high of Rs298.93 after gaining Rs8.71 in the …