Please enable JavaScript to view the chart.
Current S&P 500 PE Ratio: 19.72 +0.00 (0.01%)
4:00 PM EDT, Fri May 20
Mean: 15.97
Median: 14.89
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.