by Charles Hugh Smith, Of Two Minds:

Should bubble symmetry play out in the S&P 500, we can anticipate a steep 45% drop to pre-bubble levels, followed by another leg down as the speculative frenzy is slowly extinguished.

Bubble symmetry is, well, interesting. The dot-com stock market bubble circa 1995-2003 offers a classic example of bubble symmetry, though there are many others as well. The key feature of bubble symmetry is the entire bubble retraces in roughly the same time frame as it took to soar to absurd heights.