Corning (GLW) shares surged 5.01% in pre-market trading, extending a strong rebound as a bullish analyst upgrade and broad-based optical communications sector momentum reignited investor interest in the stock.

The rally was fueled by Truist Securities' upgrade of Corning from "Hold" to "Buy," with a price target of $175, implying approximately 16% upside. Analyst Matthew Niknam noted that following Corning's roughly 45% pullback in July, the valuation has returned to a reasonable level, while projecting earnings per share to grow at a 30% compound annual growth rate through 2029, with potential for further upward revisions to long-term financial guidance.

Additionally, U.S.-listed optical communications stocks rallied broadly in the pre-market session, generating sector-wide momentum. Applied Optoelectronics and Coherent both posted strong gains, reinforcing positive sentiment around Corning's optical segment, which delivered record 21% net margins in the second quarter as enterprise-network sales surged 65% on doubled generative-AI-related revenue.