Corning keeps climbing while Nvidia and Micron fall because its optical fiber, connecting GPUs within and between AI data centers, matters as much as the chips as clusters scale. An AI switch rack needs about 10 times the fiber density of a traditional cloud network, multiplying each chip generation. Hyperscalers are locking in supply years ahead: Meta up to $6 billion through 2030, a multibillion-dollar Amazon deal and an Nvidia partnership for three US plants. Optical sales grew 36% in Q1. x.comÂ