Shiller PE Ratio Chart
Current Shiller PE Ratio: 26.50 +0.09 (0.33%)
4:30 pm EDT, Fri Aug 29
Mean: 16.55
Median: 15.93
Min: 4.78 (Dec 1920)
Max: 44.19 (Dec 1999)

Shiller PE ratio for the S&P 500.

Price earnings ratio is based on average inflation-adjusted earnings from the previous 10 years, known as the Cyclically Adjusted PE Ratio (CAPE Ratio), Shiller PE Ratio, or PE 10 — FAQ.

Data courtesy of Robert Shiller from his book, Irrational Exuberance .