The Pakistani rupee registered marginal improvement against the US dollar, appreciating 0.05% during the opening hours of trading in the inter-bank market on Wednesday. At 10am, the currency was hovering at 280.72, a gain of Re0.15 against the greenback. On Tuesday, the local unit had closed at 280.87, the highest in nearly six months. Globally, the US dollar hovered close to a one-week l