sorry chaps if i may - i know it's a TA forum but I think i have to say it anyway.
in no way am i encouraging anyone to trade on monthly statistics over the past century
but the only Dec I saw really bad was that of 2000 - when ppl actually stayed short into Xmas - only to get whipped by unexpected Fed's rate cut on Jan 3rd 2001.
in present market conditions, imagine u r a floor boy with 5+ mln quid delta limit, how wud u approach your guv to explain the reasoning behind opening a new short into Xmas - or even staying short into it?
I am not saying we won't drop but ANY drop will have to be after NY