As we've frequently pointed out, these indicators aren't useful as short-term signals of market direction. Periods of over- and under-valuation can last for many years. But they can play a role in framing longer-term expectations of investment returns. At present, market overvaluation continues to suggest a cautious long-term outlook and guarded expectations. However, at today's low annualized inflation rate and the extremely poor return on fixed-income investments (Treasuries, CDs, etc.) the appeal of equities, despite overvaluation risk, is not surprising.

Check out this article for more particulars.

https://www.advisorperspectives.com/dshort/updates/2020/10/07/is-the-market-still-overvalued

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