Is Corning, Inc. overvalued or undervalued?

As of 14 November 2025, the valuation grade for Corning, Inc. has moved from fair to expensive, indicating a shift towards overvaluation. The company appears overvalued based on its high P/E ratio of 94, a Price to Book Value of 8.61, and an EV to EBITDA of 33.00. In comparison, Amphenol Corp. shows a more attractive P/E of 41.01 and an EV to EBITDA of 27.33, highlighting the relative expense of Corning's valuation metrics.
Despite Corning's impressive year-to-date return of 72.69%, which significantly outpaces the S&P 500's return of 14.49%, the elevated valuation ratios suggest that the stock may not be a sustainable investment at its current price. Overall, the combination of high valuation ratios and the recent grade change supports the conclusion that Corning, Inc. is overvalued.