The Pakistani rupee registered marginal gain, appreciating 0.01% against the US dollar in the inter-bank market on Monday. At close, the local currency settled at 279.07, a gain of Re0.03, against the greenback. On Friday, the local unit closed at 279.10. Meanwhile, the US dollar was steady on Monday, while the yen flirted with the crucial 160 per dollar level as nervous investors took stoc