ASML shares dropped sharply after a report pointed to rising competition in China, putting pressure on the Dutch chip-equipment company and weighing on broader semiconductor stocks. The sell-off made ASML one of the biggest decliners in the Philadelphia semiconductor index during the session.

The market reaction suggests investors are closely focused on any sign that China could become more competitive in areas tied to semiconductor manufacturing equipment. ASML is a major name in the chip supply chain, so negative headlines around its competitive position can quickly affect sentiment across the sector.

Chip stocks moved lower alongside ASML as traders appeared to reassess risks tied to demand, market share and the longer-term outlook for equipment makers. When a leading company in the group faces fresh uncertainty, the pressure often spreads to related names on major semiconductor indexes.

While the report centered on China, the broader takeaway for investors was the potential impact of new competition on one of the industry’s most closely watched companies. That concern was enough to send ASML stock lower and pull other semiconductor shares down with it.