U.S. optical communications sector collectively rose before the market opened, Lumentum rose 3%
[U.S. optical communications sector collectively rose before the market opened, Lumentum rose 3%] Financial News Agency reported on July 20 that the U.S. stock optical communications sector collectively rose before the market opened, with Lumentum rising 3%, Credo rising more than 2%, and Coherent, Corning, and Marvel Technology rising more than 1%.