On June 23, ASML fell 7.42% in regular trading, trading at $1,789.54/share, with turnover of $940 million. The semiconductor equipment sector experienced broad-based selling pressure, with the decline driven by escalating U.S. export control concerns and sector-wide weakness.

On the news front, U.S. Commerce Secretary Howard Lutnick recently raised concerns to ASML leadership that one of the company's advanced EUV lithography systems may have been diverted to China in violation of U.S.-led export restrictions. ASML firmly denied the allegations, stating it has never shipped any EUV system or EUV-specific components to China. U.S. officials have not publicly presented evidence supporting the claim. The dispute comes as ASML reported a 56% quarter-over-quarter plunge in China mainland system sales in Q1, with the region's share of group system revenue dropping from 36% to 19%.

The broader semiconductor equipment sector declined sharply, with Applied Materials down 9.2%, Lam Research down 9.8%, KLA-Tencor down 9.49%, Teradyne down 10.19%, and AXT Inc down 10.95%, reflecting heightened investor anxiety over potential further tightening of chip equipment export controls.

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