tip:ief

Inflation (actually deflation) expectations back to 2008/9 lows ...

AAII sentiment: !AAIIBEAR and !AAIIBULL, set to weekly and solid line.
Rydex Ratio: !ASETBEARI and !ASETBULLI
S&P breadth: $BPSPX = percent of stocks with bullish P&F

A chart of log(S&P) during the last 51 years. The dotted blue line is a simple linear regression line, the other lines are parallel to it. The numbers suggest a similarity, which may or may not mean anything.