A pause, a passageway, and a promise to keep talking. That's essentially what's included in the Iran-US agreement released a few hours ago. It extends the April ceasefire by another 60 days and restores full maritime traffic through the Strait of Hormuz, without the extra charges that had become one more tax on an already nervous global economy. Brent fell again, sliding toward $77 a barrel, its lowest level since early March. For markets, the agreement is less a breakthrough than a badly needed reduction in one of the world’s most expensive risks.