Amtech, MACOM, and IPG Photonics shares fall as US-China AI tensions and supply chain concerns weigh on semiconductor stocks.

Amtech (NASDAQ:ASYS) fell 7.1%, MACOM (NASDAQ:MTSI) fell 3.5%, and IPG Photonics (NASDAQ:IPGP) fell 6% following China's order for Meta to unwind its $2 billion acquisition of AI startup Manus on national security grounds, and White House accusations that China is stealing American AI technology on an "industrial scale".

Geopolitical instability involving the US, Israel, and Iran has also raised concerns about global supply chain disruptions and higher raw material costs for technology hardware companies, adding to investor uncertainty about potential production delays and increased operational costs.

Amtech has experienced 65 moves greater than 5% over the last year, with the stock gaining 13.1% three days prior on news of strong earnings from Intel and positive industry-wide forecasts, including 22% growth in Intel's data center business.