After watching the market for a couple years and hearing veteran traders remark December trades 'characteristically different' than other months, I can attest from my own observations there is some truth to this. From what i've witnessed this year and last, December price behavior usually exhibits: big moves which are more 'erratic' than than average 'big move' witnessed in other months Pull backs are steeper intraday moves are faster and shorter lasting. gains are less likely to hold before trend resumes. Can anyone else speak to this? Does december trade qualitativily different than other months? If so, why? Or does december trade no different than other months? Thanks.