Jim Cramer - Mad MoneyCorning IncGLWDON'T BUYMay 18, 2026

Don't confuse a good company with a good investment. Likes it, but look at the inflection on the chart. You want to buy when it's dead money, and then wait for an inflection.

Don't chase a parabolic chart. You need to trim, not allocate new money (or you're asking for trouble).

Fibre optics. Won massive contract with AAPL, which adds growth. Don't buy up here. Enter ~$140-145, add more ~$125-130.

The estimates for the next two years are too low. Their glass will take over data centres.

All stocks that moved up big already are vulnerable in this market. It could go down further than today. He would pick up more after it sells off more.

Big play now is data centre expansion through fibre. Look at that chart -- when stocks gap up, it's the trend that's in vogue. At some point you're part of a Ponzi scheme, and you need to get out with your profit.

Exceptionally robust growth projections and remarkably favorable stock momentum characterize the current outlook. The strength of Corning's AI-driven optical product sales continues to enhance both immediate and future revenue prospects under its Project Springboard initiative. Management increased its fourth quarter 2026 Springboard sales run-rate expansion goal by $500 million, bringing it to $6.5 billion. While fourth quarter optical sales came in below analyst expectations, the enterprise optical segment achieved 30% growth, aligning with forecasts. Considering the ongoing build-out of AI infrastructure, maintaining 30% growth in enterprise optical appears feasible. When combined with increasing contributions from solar and silicon wafer production, Corning could potentially deliver sales growth in the mid-to-high teens range, even with flat panel display sales remaining steady in 2026. Trading at 42 times earnings, the valuation isn't inexpensive, yet they believe it remains an attractive purchase. Unlock Premium - Try 5i Free

He bought more because of their $6 billion deal with Meta.

It reports Wednesday. It's busy replacing copper with fiber. Prospects are excellent.

Is up 56% in Q3, and one of the top S&P stocks in Q3. Their Apple partnership is huge, but so is their fibre-optic glass used to move information in data centres which he expects to replace the copper used in data centres.

A leader. Defensive place to hide. Higher highs and lows since bottom in last 2023. Defined uptrend, remains positive. Further upside, looking for new all-time highs.

Would not recommend buying. Hasn't be able to generate returns. 

Best of companies in sector. Lots of business models and joint ventures. Not a good business in recession (consumer spending). Likes company, but wait to buy (not cheap, but not expensive). Wait to buy. 

Lots of exciting areas, but a 21-22x PE, which is too rich in a very cyclical business.