ASML stock dropped to its lowest since June after a Chinese consortium began producing homegrown DUV lithography machines, raising concerns about

A Shanghai-based company has begun making immersion DUV lithography machines, The Information reported. ASML shares dropped 6.5%. China's share of ASML sales fell to 14%.

Reports that China has started mass-producing homegrown DUV lithography machines actually describe two separate developments being treated as one. A Shanghai firm linked to…