Good Articles from GMO on investing

I came across this news letter. It has two interesting articles on why stock prices are so high, and when they will go down. The two articles are "Why are stock prices so high?" by Jeremy Grantham, and The S&P 500 Just Say No by Kadnar and Monteir

https://www.gmo.com/docs/default-source/public-commentary/gmo-quarterly-letter.pdf?sfvrsn=46

GMO is an investment company with $10 million minimums. [Although I see there is one GMO mutual fund listed on Schwab.com.]