Actually I have made a mistake. The 1929 crash didn't last 11 years it lasted about 3 years and dropped 86%. We are only down 25-30 percent now, so if this turns out to be a 1929 type of crash, the Dow would drop all the way down to about 2,000. The recovery didn't take 11 years like I originally stated, it took 22 years to recover that 86%. Here is a good short write up about the 1929 crash.
1929Stock Market Crash:
This is the grand daddy of them all. Investors lost 86% of their money over this 813 day beast. This market crash combined with the 1929 crash, makes up the great depression.
If you had $1000 on 9/3/1929 (beginning of the 4th worst crash, it would have gone down to a whopping $108.14 by July 8th, 1932 (end of the worst crash) or an 89.2% loss. To recover from a loss like that, you would have to watch your portfolio go up 825%! The full recovery didn't take place until 1954, 22 years later!