Is S&P Global, Inc. overvalued or undervalued?

As of 31 October 2025, the valuation grade for S&P Global, Inc. moved from very expensive to expensive, indicating a shift in perception regarding its valuation. The company appears to be overvalued based on its current metrics, with a P/E ratio of 42, a Price to Book Value of 5.60, and an EV to EBITDA of 27.64. In comparison, Moody's Corp. has a higher P/E of 73.62 and an EV to EBITDA of 49.32, suggesting that S&P Global is relatively less expensive within its peer group, but still on the higher end of the valuation spectrum.
The stock has underperformed against the S&P 500 over various periods, notably with a year-to-date return of -0.20% compared to the S&P 500's 16.30%, and a one-year return of 2.84% versus 19.89% for the index. This underperformance reinforces the notion that S&P Global, Inc. is currently overvalued in the market.