Unlike the investment banks that prioritize making money off of their clients, GMO seems to think making smart investment decisions is the more important job. On an annual basis GMO releases their 7 year forecasts for different asset classes. Most recently they released a rather uninspiring forecast that puts US equities as one of the least attractive:
If you get a little skeptical about the forecast, take a look at their 10 year results from 1999-2009. I can’t say that there are many who called it better: