The US dollar posted its best single-day gain in two weeks after reports that Iran was attempting to restrict US and Israeli vessels from the Strait of Hormuz pushed oil prices higher. The Bloomberg Dollar Spot Index climbed 0.2% on August 6, and the dollar has now gained 1.5% since US military action against Iran began in late February 2026.
The US dollar booked its best trading day in two weeks, as oil prices climbed on renewed Strait of Hormuz tensions. Fresh reports emerged that Iran was attempting to restrict US and Israeli vessels from passing through the strait, reviving the dollar's safe-haven appeal.
Oil tensions revive the safe-haven trade
The Bloomberg Dollar Spot Index climbed 0.2% on August 6, its largest single-day gain since July 23. The move came as reports surfaced that Iran was attempting to restrict US and Israeli vessels from passing through one of the most critical chokepoints for global oil supply.
Oil prices advanced on the restriction reports, while US 10-year Treasury yields rose alongside the dollar, reflecting what analysts described as a growing inflation-risk premium tied to elevated energy costs. The dollar's strength showed up most against the yen, where it gained 0.5% and pushed past its 200-day moving average to reach approximately 158.55.
A rally with roots back to February
This wasn't a one-day move. The dollar has gained 1.5% since US military actions against Iran began in late February 2026, operations that disrupted global energy flows and changed how markets price geopolitical risk. Market analysts framed the latest rally as a retreat from earlier expectations of geopolitical easing.
Recent US data added another tailwind: second-quarter figures showed an acceleration in labor productivity growth, giving the currency fundamental support beyond the oil-driven move.
What traders are watching next
The immediate focus shifts to US payroll data and scheduled remarks from Federal Reserve officials. A simultaneous rise in oil and the dollar also squeezes emerging-market economies that price their oil imports in dollars, a combination that can trigger capital outflows and currency weakness in developing nations.
Source: Crypto Briefing
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