On Wednesday, optical communication concept stocks declined broadly, with Applied Optoelectronics (AAOI.US) dropping more than 6%. Coherent (COHR.US), Credo Technology (CRDO.US), and POET Technologies (POET.US) each fell more than 4%. Nokia (NOK.US) declined nearly 4%, Lumentum (LITE.US) dropped more than 3%, Corning (GLW.US) slid nearly 3%, and Marvell Technology (MRVL.US) fell nearly 2%.