ASML’s shares fall after a report says China has started mass producing certain immersion deep-ultraviolet (DUV) lithography machines, raising questions about potential pressure on the Dutch chipmaking-equipment supplier. Multiple outlets cite a report from The Information that the tools are being manufactured by a state-backed company in Shanghai. The machines are described as the type ASML is restricted from selling to China under Dutch and U.S. export controls. As the news spreads, ASML shares drop sharply in European trading and in the U.S. as well, with one report noting a move of more than 8% at one point in the U.S. before shares later close down about 5.8%. Other coverage describes similar declines in Amsterdam, including a peak intraday fall around 6.5%. Analysts quoted by one outlet characterize the development as part of broader Western concerns about progress in China’s chipmaking equipment, but they also say home-grown tools are not necessarily the biggest threat to ASML. Overall reporting centers on market reaction to the production claim and the extent to which it could affect ASML’s restricted China sales under export-control rules.