道瓊斯指數8月19日（週三）收盤上漲119.71點，漲幅0.22%，報53463.11點； 標普500指數8月19日（週三）收盤上漲16.50點，漲幅0.21%，報7708.26點； 納斯達克綜合指數8月19日（週三）收盤上漲41.38點，漲幅0.16%，報26331.09點。

加拿大總理卡尼：美國已同意推遲根據1930年《美國關稅法》第338條對一系列加拿大商品徵收50%關稅的實施，直至8月21日結束。

A conflict once expected to last days or weeks is approaching six months, raising the risk Iran may delay any deal until the end of President Trump’s term in January 2029. Markets have largely abandoned a rapid resolution but have not fully priced a scenario extending to Jan 2029. An adviser to Iran’s parliamentary speaker said Trump would not reach a deal and Iran would “accompany” him but not sign a real agreement before his term ends. If fighting persists through Jan 2029, market, corporate and household expectations would have more time to adjust; oil and refined-products forward curves would likely reprice to reflect higher prices sustained for longer. Gulf exporters are expected to accelerate alternative export routes, efforts to bypass or reduce reliance on the Strait of Hormuz, or seek negotiated safe‑passage arrangements with Iran in exchange for cash or gold; some alternative routes are reportedly advanced. Iran may intensify pressure on energy and shipping, restricting crude and refined-product outflows and disrupting tanker flows. A prolonged stalemate could erode perceived US geopolitical credibility, prompting partners to seek security and economic alternatives — a trend with prior economic precedents after recent US trade actions. Broader geopolitical spillovers, including increased risk involving Russia, may rise. The petro‑dollar recycling dynamic could become less stable; while the dollar is likely to remain dominant, oil‑dollar flows may increasingly diversify or shift toward alternative arrangements.