There are no absolutes
Yeah AAPL is often volatile in the days immediately following product announcements but it has actually risen on occasion.
For example, the introduction of the iPhone at Macworld Expo in 2007 resulted in a jump of over 8 percent.
Finally, unless you're day trading, it hardly matters.
Hate to break it to ya Mr. Stockholder, I have yet to see the stocks increase after any Apple Keynote no matter how awesome the product is.
Yeah AAPL is often volatile in the days immediately following product announcements but it has actually risen on occasion.
For example, the introduction of the iPhone at Macworld Expo in 2007 resulted in a jump of over 8 percent.
Finally, unless you're day trading, it hardly matters.