Woofun AI data shows that US optical communication concept stocks experienced a general decline at the market opening on July 2. The Pure Play Photonics ETF (FOTO) fell by 1.62%, while Marvell Technology (MRVL), previously highlighted by Huang Renxun as a potential trillion-dollar company, dropped by 0.07%. Individual equities also slid, with Applied Optoelectronics (AAOI) down 1.62%, Lumentum Holdings (LITE) down 1.39%, Coherent Corp. (COHR) down 1.68%, and Ciena Corporation (CIEN) falling by 2.21%.