Quote from atticus:
dhpar's ticker went from 12.8x to 10.9x from 12/9 to date; and the highest dollar value in OI was in the 12.5 and higher strike prices. I don't see any way to correlate max-pain and a drop in the shares towards the low dollar value strikes (in terms of OI).
max pain was actually ~10.80 for quite some time. so here you go - stock price from 12.8 to 10.80 as of now. the reason is exactly the same as the reason behind manipulating the VIX settlement price... and it was done on tiny volume (daily around $2M in cash) which was helped by retail stop losses no doubt....
in general i would never use M-P on liquid stock or high market cap companies as i mentioned at the beginning of the thread. for spiders (or GOOG) it must be close to irrelevant if only because the option trading concentrates more on gamma. that is not possible with illiquid stocks where dynamic replication does not apply 100% - if you see my point...