S&P 500 Shiller CAPE Ratio:

S&P 500 Shiller CAPE Ratio is at a current level of 30.63, up from 29.61 last month and up from 28.71 one year ago. This is a change of 3.46% from last month and 6.72% from one year ago.

The S&P 500 Shiller CAPE Ratio, also known as the Cyclically Adjusted Price-Earnings ratio, is defined as the ratio the the S&P 500's current price divided by the 10-year moving average of inflation-adjusted earnings. The metric was invented by American economist Robert Shiller and has become a popular way to understand long-term stock market valuations. It is used as a valuation metric to forecast future returns, where a higher CAPE ratio could reflect lower returns over the next couple of decades, whereas a lower CAPE ratio could reflect higher returns over the next couple of decades, as the ratio reverts back to the mean.