https://www.live-feeds.com/feed/stock-market-today-dow-s-p-500-nasdaq-futures-extend-losses-amid-us-iran-tensionsContinuously updated, source-cited coverage. https://www.live-feeds.com/feed/stock-market-today-dow-s-p-500-nasdaq-futures-extend-losses-amid-us-iran-tensionshttps://www.live-feeds.com/feed/stock-market-today-dow-s-p-500-nasdaq-futures-extend-losses-amid-us-iran-tensions#u45079Wed, 19 Aug 2026 05:20:44 +0000Dow, S&P 500, and Nasdaq futures are trending lower as tensions between the US and Iran escalate. Markets are reacting to the expiration of a US-Iran truce, which has triggered a spike in Treasury yields and higher oil prices. While some reports indicate mixed futures or steady movement due to easing rate hike fears and positive earnings, multiple sources report tumbling premarket activity and sinking tech shares. The overall sentiment reflects a shift from recent gains toward volatility driven by geopolitical instability and surging yields.Why it mattersThe S&P 500 and Nasdaq recently