Research shows that the German DAX index now performs sluggish around the turn of the month.
By looking at how the index performs 'two tradingdays before through two tradingdays after' the change of a month, you see that markets favours to turn significantly lower within this short 4 day timeframe four out of the last five instances.

Trading over August to September saw the index drop - 2.7%. The 4 intradays October to November brought the index + 2.6% higher, but all last 5 'turn of the month' cases shows negative development of totally - 4.4%.
The tradingperiod analysed equals a start tomorrow Wednesday to end Monday. Remeber that passed performance is history and by no means accurate of what will happen in the future. Even though, the research here is an interesting observation of the passed.
2019-01-29 11:06 | Dax