So let me do the preachers of Armageddon one better. Today's stock market isn't just the “worst since the Great Depression,†like they're so fond of saying. No, it's even worse than the Great Depression. Take a look at the chart, below. It shows the daily progress of the S&P 500 in terms of percentage change from the very top. The brown line is the change from the recent all-time highs on October 9, 2007. The blue line is the change from the all-time highs just before the Great Depression, September 6, 1929. As of yesterday's close (Thursday, March 5),...