Shiller PE Ratio Chart
Current Shiller PE Ratio: 26.90 +0.21 (0.80%)
4:10 pm EDT, Fri Sep 30
Mean: 16.70
Median: 16.05
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 .