On August 13th, Apple
Apple Monthly Histogram from 1980
The average month of September is graphed as a daily histogram below. Eighteen of the days in the month have had a negative expected return. The last ten days of the month have had the worst returns.
Apple Daily September Histogram
The technical picture is weak. Note that the stock is very overbought and that relative strength peaked on June 30th. The $160-$162 level is a downside target. A break of this level could lead to much lower quotes. The average low has been in the October 3rd to 7th time span.
Daily Apple Price, Momentum, and Relative Strength