Billy,
This is an interesting chart (at least to me). Do you have some insight as to the use of opex pivot levels? I assume it has to do with market makers generally wanting to minimize their own risk by pinning indexes at certain levels, but not sure.
We've discussed how looking at outstanding contract expirations can indicate where option market makers will likely take prices at expiration. I'm curious whether opex pivot level work somehow works well in tandem with this.
Anyway, be interested in your (and others) thoughts
http://chart.ly/6j6carw