Corning Tumbles 12% on $2B At-the-Market Equity Offering; Coherent Sinks 11%, Lumentum Drops 9%, Fabrinet Slides 6%
Yahoo Finance · Sep 14, 2026 · Coherent Inc (COHR)
A surprise equity filing sent Corning to the bottom of the S&P 500 and pulled the entire AI optical sector down with it, raising a pointed question about whether a stock that surged 67% this year just flashed a warning sign for the broader hyperscaler buildout trade.
Not investment advice. Cached headline, not a full reprint.