1130 GMT - Gulf markets are likely to remain focused this week on whether negotiations over the Strait of Hormuz translate into a visible improvement in shipping activity, Iridium Advisors says. Higher oil prices are no longer lifting regional markets uniformly, with investors distinguishing between companies benefiting from tighter energy and logistics markets and those exposed to slower trade, travel disruption or margin pressure, the firm says. The final large wave of second-quarter earnings calls should also remain in focus, with 26 scheduled this week before the reporting calendar thins out, Iridium says.