On April 3, 2026, lawmakers from both major U.S. political parties introduced a draft legislative proposal named the MATCH Act. This legislation seeks to impose further restrictions on allied companies, including ASML, by prohibiting the sale of chip manufacturing equipment to China. Notably, it also calls for the cessation of maintenance services for equipment already sold, with the control measures extending even to older-generation DUV lithography machines. ASML, the global frontrunner in lithography machine manufacturing, holds a monopoly on the supply of EUV lithography machines. Its DUV lithography machines are indispensable for the mature process production lines of Chinese chip manufacturers. In 2025, China emerged as ASML's largest market, contributing 33% to its annual sales. However, ASML anticipates that due to the tightening controls, its sales share in China will dwindle to approximately 20% in 2026. Should the bill be enacted, this proportion is expected to nosedive even further. The proposed legislation specifically targets Chinese chip manufacturers such as SMIC, Hua Hong Semiconductor, and Huawei, barring the sale of equipment as well as the provision of maintenance and technical services to these entities. Analysts have pointed out that if the bill is passed by the U.S. and subsequently enforced by the Dutch government, ASML will be subjected to new export restrictions. This will severely impede its ability to sell and maintain DUV immersion lithography machines for Chinese customers. Consequently, on the first trading day following the bill's announcement (Tuesday), ASML's stock price took a hit, plummeting by as much as 4.7%. By 11:00 GMT, it had declined by 4.1%, settling at €1,114.