http://economix.blogs.nytimes.com/2008/10/10/how-long-before... > Some may also wonder how long it will take the market to “recover.” It depends exactly what is meant by “recover,” of course, but one measure might be when the market returns to its pre-crash peak. The historical data is somewhat more distressing in this context. > After the Great Depression, it took 29 years — until 1958 — for the market to reach its…
The 'going back up' part is where all the money is made.
If you invested in the index, you break even over that period.
But if you invest in big winners(taking Apple and Microsoft for known examples in tech) you come out way ahead.