Memory chip stocks rally 2.7% as US pressures Chinese suppliers

The PHLX Semiconductor Sector index climbed 2.7% to $12,759 Monday, putting it on track to enter a new bull market, after the US administration discouraged domestic tech firms from buying conventional memory chips from Chinese suppliers.

"The Trump administration is not in favor of that," Commerce Secretary Howard Lutnick said in an interview with The Wall Street Journal, referring to Apple's potential sourcing of memory chips from Chinese manufacturers. "There have to be other solutions to the memory issue, but it's not great American companies using Chinese memory."

Micron Technology rose 5.7%, while Sandisk jumped 8.7%. Western Digital gained 5.4% and Seagate Technology added 1.7%. The gains reflect investor expectations that restrictions on Chinese memory suppliers will redirect demand to domestic producers, strengthening their pricing power and market share. The rally also lifted the broader semiconductor complex, with the PHLX index's advance marking a potential shift from the correction territory it entered earlier this year.

Apple's Memory Dilemma

The administration's pressure targets CXMT and YMTC, two Chinese memory manufacturers that Apple has been evaluating as potential suppliers. YMTC sits on the US Commerce Department's Entity List, and the Pentagon has designated both companies as Chinese military firms over alleged ties to China's military. Apple has tested DRAM from CXMT and explored a potential deal with YMTC as it navigates an AI-driven memory supply crunch that has pushed prices sharply higher across the industry.

Apple COO Sabih Khan told the WSJ that memory components require less customization than other iPhone parts, raising the possibility that the company could use off-the-shelf Chinese chips. However, US export-control rules would restrict Apple from sharing technical information with CXMT or YMTC without a Commerce Department license, complicating any potential deal. The regulatory hurdles mean that even if Apple wanted to source from Chinese suppliers, the path forward would be fraught with compliance challenges.

The pushback arrives as Apple deepens its US manufacturing footprint. Lutnick's comments came a day after he joined CEO Tim Cook at the opening of Apple's Advanced Manufacturing Center in Houston, part of the company's $600 billion domestic investment commitment. Cook has said Apple is "evaluating all options" for memory supply, and a bipartisan group of senators has urged the company to abandon plans to source from Chinese suppliers.

What's at Stake

For US memory chipmakers, the administration's stance reinforces their supply dominance and supports long-term pricing stability. The PHLX Semiconductor Sector index's climb toward bull-market territory reflects growing conviction that policy tailwinds will continue to favor domestic producers. Investors welcomed the political pressure on Chinese competitors, which strengthens the competitive position of US firms in a market where Chinese state-subsidized rivals have been gaining ground.

The next test comes as Apple determines whether it can secure alternative memory supply without turning to Chinese manufacturers. The decision will shape the competitive balance in the global memory market, where US producers like Micron and Western Digital stand to gain market share if Chinese suppliers are effectively locked out of Western supply chains. For investors, the policy direction reinforces a structural tailwind for domestic chipmakers that extends beyond the current supply shortage, with implications for pricing power and margins across the sector. The memory chip market has been one of the most tightly contested segments of the semiconductor industry, and Washington's stance could accelerate a reordering of global supply chains that has been building since export controls on advanced chips were first imposed.

This article is for informational purposes only and does not constitute investment advice.