S&P 500 PE Ratio Chart
Current S&P 500 PE Ratio: 20.11 -0.43 (-2.09%)
4:10 pm EDT, Mon Jun 29
Mean: 15.54
Median: 14.59
Min: 5.31 (Dec 1917)
Max: 123.73 (May 2009)

Price to earnings ratio, based on trailing twelve month “as reported” earnings.

Current PE is estimated from latest reported earnings and current market price.

Source: Robert Shiller and his book Irrational Exuberance for historic S&P 500 PE Ratio.