The optical communications sector of the US stock market opened low and the decline widened. Corning fell more than 8%, Mwell Technology fell more than 6%, and Lumentum, Coherent, and Credo fell more than 5%.

The optical communications sector of the US stock market opened low and the decline widened. Corning fell more than 8%, Mwell Technology fell more than 6%, and Lumentum, Coherent, and Credo fell more than 5%.