Quote from Traden4Alpha:
This chart is JUNK! First, the use of a linear scale intentionally misleads. Redo this chart with a logarithmic scale and you will see that the 1913-1920 period was the worst inflationary period in the data set. And that the deflationary spiral of the Great Depression lags the stock market crash by a year. Second, the chart doesn't even show the period of concern, which starts in somewhere in between mid-2007 to mid-2008. Third, the chart doesn't even measure the right variable for assessing deflation which would be asset prices more so than consumer prices.