which will begin here in October or no later than early November.
See the following charts that compare present with 1930.
Big picture:
1930:

2010:

And right shoulder inserts:
1930:

2010:

Notice there was a run-up in late May 1930,
very similar to what we've experienced in Sept-Oct. 2010.
The formation of the right shoulder looks very similar both times.
And I would characterize them as abc corrections in a new downtrend,
(C-wave down).
Also, please read the material at this link provided in comments.
It discussed Fed minutes and correspondence from May-June 1930.
You will find that the Fed began QE2 at the beginning of June 1930,
and a spectacular 25-30% crash immediately followed that month.
Fast forward to 2010:
Guess what the Fed is expected to do on Nov. 3?