Woofun AI data shows that US stock pre-market trading for the optoelectronics sector experienced a general decline on July 1. The Pure Photonic ETF (FOTO) fell by 0.72%. Marvell Technology (MRVL), previously highlighted by Huang Renxun as a potential trillion-dollar company, dropped by 2.92%. Other declines included Applied Optoelectronics (AAOI) down 1.83%, Lumentum Holdings (LITE) down 1.89%, Coherent Corp. (COHR) down 2.16%, and Ciena Corporation (CIEN) down 1.36%.