2006 vs. 2012 Again

I've posted this chart a few times this year already, and figured it might be a good time for an update.  The reasoning behind the comparison is that 2009-2011 traded almost in lockstep with 2003-2005.  So far the pattern in 2012 has been similar to 2006, but the pace of the advance has been a little steeper.  If the comparison holds come year end, the S&P would have to trade sideways or lower between here and then.