S&P 500 Shiller CAPE Ratio:

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.

S&P 500 Shiller CAPE Ratio is at a current level of 30.91, an increase of 1.002 or 3.35% from last month. This is an increase of 2.622 or 9.27% from last year and is higher than the long term average of 17.01.