CalculatedRisk has an interesting chart:

The chart is suggestive that the end of the bond purchases related to QE2 may correspond with the end of the stock market rally, as it did — or appeared to — at the end of QE1.
I believe nearly anything is possible, but my best guess is that the timing of the bond purchases themselves have no relevance. They exist in plain sight. The market moves on expectations not actualizations. For instance, compare the point where Bernanke hinted at QE2 vs. the actual announcement. The announcement got a blip, but the overall rally clearly began with the rumor not the news.
Second, I’m not buying that the end of QE1 and the coincidental decline in the market was more than coincidental. That timing also coincided with trouble in Europe which pressured the dollar to rise and hurt the U.S. recovery. Ideally, Bernanke would have mentioned QE2 last May instead of September in response to the pressure Europe was putting on the dollar. Hopefully, if we see renewed pressure on the dollar to strengthen due to Europe or anything else, Bernanke will step in immediately this time and not wait for a junket to Jackson Hole.
I remain long this market and plan on viewing any significant decline before or after QE2 expires as a potential buying opportunity.
As always, don’t ever take anything I say as investment advice.
