Can History Help Us Predict the Future of the S&P 500?

When the S&P 500 hits all-time high and AAII Investor Sentiment Survey bulls is below 35%, then 88% of the time the S&P 500 is positive one year later (1986-2019).

Image: SentimenTrader

S&P 500 at all-time high and AAII bulls below 35% (1986-2019)