US Semiconductor Stocks Slump as Washington Imposes New Global Tariffs

Key Facts

In a move reflecting escalating global trade tensions, the U.S. government has announced new tariffs targeting 60 trading partners, sparking immediate concerns over production costs in the technology sector. According to reports, shares of major firms including Micron, onsemi, Seagate, and Western Digital declined following the announcement of tariffs ranging from 10% to 12.5%. These measures target critical semiconductor hubs such as the EU, Japan, Taiwan, and South Korea, which are essential providers of specialty chemicals and fabrication equipment.

This pressure comes at a sensitive time for the semiconductor industry, as investors fear long-term margin compression due to rising supply chain costs. Per market data, Micron (MU) closed at $990.21 on July 23, 2026, while onsemi (ON) stood at $92.33 as of the July 22, 2026 close. U.S. firms are particularly vulnerable as many utilize Outsourced Semiconductor Assembly and Test (OSAT) facilities in the targeted regions, meaning finished chips imported back into the U.S. will face higher costs.

Regarding price levels, Seagate (STX) was at $908.1 at the July 22, 2026 close, while Western Digital (WDC) closed at $487.42 on July 20, 2026. Traders are now monitoring the sustainability of these geopolitical pressures, especially following recent trade balance data from Japan showing a deficit of 406.9 billion yen, highlighting broader global trade disruptions that could further impact sector supply chains in the near term.