On July 21, according to BIT(bit.com) market data, US stock pre-market optical communication concept stocks rose across the board, among which: Pure Photonics ETF FOTO up 3.81%; Marvell Technology (MRVL) up 6.24%; AAOI (Applied Optoelectronics) up 5.07%; LITE (Lumentum Holdings) up 5.15%; COHR (Coherent Corp.) up 5.23%; CIEN (Ciena Corporation) up 3.94%.
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