It is a measure of how valuable a company stock is (price-to-earnings ratio) but in contrast to the standard P/E which looks at data for only one year it looks

It is a measure of how valuable a company stock is (price-to-earnings ratio) but in contrast to the standard P/E which looks at data for only one year it looks at data for the previous ten years, so it's less volatile. https://en.wikipedia.org/wiki/Cyclically_adjusted_price-to-earnings_ratio https://en.wikipedia.org/wiki/Cyclically_adjusted_price-to-e...