Coherent Corp shares fell 3.76% at the U.S. market open even after the optical communications company issued quarterly results and forward guidance that exceeded market expectations. The company reported Q4 revenue of $2.05 billion, up 34% year over year and above the expected $1.98 billion to $2.02 billion. For Q1, it projected revenue of $2.20 billion to $2.40 billion, ahead of the $2.13 billion consensus, and adjusted EPS (earnings per share) of $1.85 to $2.05, above the expected $1.77. The broader optical communications segment traded unevenly, with the pure-play photonics ETF FOTO up 0.05%, Corning slipping 0.19%, Marvell Technology rising 1.73%, Applied Optoelectronics down 1.10%, Lumentum Holdings off 0.39%, and Ciena up 0.93%. The moves suggest investors were selective across AI data center and photonics-linked names despite strong guidance from one of the sector’s largest companies.