Why ASML Holdings Plunged Today

ASML Holdings dropped 5.75% following reports that China is producing domestic deep-ultraviolet lithography machines, a development that raises questions about the Dutch chipmaker's export-dependent growth model. The sell-off reflects concern that China's push for semiconductor self-sufficiency could erode demand for ASML's equipment.

Analysts quoted by The Motley Fool pushed back on the threat's severity. China's lithography manufacturers are estimated to produce only 5 to 20 DUV machines annually, a fraction of ASML's output of more than 130 units. The company's monopoly in extreme ultraviolet technology—higher-margin equipment required for leading-edge chips—remains unchallenged, and ASML's strategic shift toward EUV positions it to defend pricing power even if DUV competition intensifies.

The single-day move wipes out roughly a week's gains but leaves ASML within recent trading ranges. No change in guidance or order flow was reported alongside the drop.