Shares of Corning dropped 5.7% to $196.50 on Thursday as traders cashed in gains from a blistering AI-fueled rally that has more than quadrupled the stock in a year. The selloff tests whether the 175-year-old glassmaker's pivot into AI plumbing is worth one of the richest valuations in industrial tech.
A Blockbuster NVIDIA Deal Sparked the Surge — Now the Market Wants Receipts
Corning announced a multiyear partnership with NVIDIA to build three new optical-fiber factories in North Carolina and Texas, expanding U.S. optical manufacturing capacity tenfold and creating at least 3,000 jobs.
NVIDIA can invest up to $3.2 billion in Corning through warrants, including 15 million shares at $180 apiece. That's a powerful endorsement, but the stock ran from $187 to $208 in four sessions on the news, and today's drop shows the market asking whether execution can match the hype.
The Earnings Are Real, But the Price-to-Earnings Ratio Is Eye-Watering
First-quarter core sales grew 18% to $4.35 billion, and core earnings per share grew 30% versus a year ago.
The optical communications segment was the standout, with sales up 36% year over year to $1.85 billion. Yet Corning's current P/E ratio of 99.2x is significantly higher than its 5-year median of 44.4x — meaning investors are paying roughly twice the historical premium for each dollar of profit. That leaves little room for a stumble.
Insiders Are Selling Into the Strength
Over the past three months, insiders sold $39.2 million worth of shares, and there have been no insider purchases during this period. When executives sell aggressively while the stock sits near all-time highs, it raises a natural question about whether the people closest to the business think the price has gotten ahead of itself.
The Long-Term Growth Promise Is Huge — If AI Spending Holds
Corning now expects to hit a $20 billion annualized sales run rate by the end of 2026 and to compound at a 19% annual rate through 2030, targeting $40 billion.
Its new AI-focused optics business alone is expected to grow into a $10 billion revenue stream by 2030. But those projections assume hyperscale customers like Meta and NVIDIA keep spending at record levels for years. Risks remain, including the possibility that AI infrastructure spending eventually cools or that large customers push back on pricing.
The bottom line: Corning's AI story is backed by real contracts and real revenue growth. But at nearly 100 times earnings with insiders heading for the exits, today's pullback is the market reminding shareholders that even the best narratives need a price that makes mathematical sense.