New York Stocks Fall on Iran Blockade, Semiconductor Stock Plunge; SK Hynix ADR Down 9%

New York stock markets closed lower on Tuesday, impacted by renewed U.S.-Iran conflict and growing caution surrounding artificial intelligence (AI) investments. The Dow Jones Industrial Average fell 0.26%, the S&P 500 dropped 0.79%, and the tech-heavy Nasdaq Composite saw a larger decline of 1.55%.

The escalating tensions in the Middle East, particularly following President Donald Trump's announcement of a renewed naval blockade against Iran, fueled concerns about potential disruptions to oil supply. This geopolitical uncertainty weighed heavily on the broader market.

Adding to the downward pressure, the technology sector faced selling pressure, especially in semiconductor and memory chip stocks. This trend was partly driven by profit-taking after recent rallies and renewed concerns about the sustainability of AI investment spending. Micron Technology fell 4.3%, AMD dropped 4.2%, and Intel declined 6.1%. SanDisk saw a significant drop of 12.7%, and Seagate Technology fell 5.4%.

SK Hynix's American Depositary Receipts (ADRs) were particularly hard-hit, plummeting 9.32% to $152.35. This sharp decline erased most of the gains from its debut on July 10th, when it surged 13.1%. Barron's reported that concerns about the long-term viability of AI investment spending were a key factor behind the slump in SK Hynix's U.S.-listed shares. The domestic stock also fell over 15% in South Korea, with analysts suggesting that profit-taking after a more than 500% price increase over the past year also contributed to the ADR's fall.