Is Corning, Inc. overvalued or undervalued?

As of 17 October 2025, the valuation grade for Corning, Inc. has moved from fair to very expensive, indicating a shift towards overvaluation. The company appears overvalued based on several key metrics, including a P/E ratio of 94, a Price to Book Value of 8.61, and an EV to EBITDA ratio of 33.00. In comparison, Amphenol Corp., a peer in the same industry, has a significantly lower P/E ratio of 41.01, highlighting the disparity in valuation between these companies.
Corning's recent stock performance has outpaced the S&P 500, with a year-to-date return of 77.80% compared to the S&P 500's 13.30%. However, despite this strong performance, the high valuation ratios suggest that the stock may not be a sustainable investment at current levels.