In the spirit of fashion, let me begin this article off with a runway of sorts, even if it is a lineup of stock charts rather than models.
Here is a chart of Michael Kors (KORS) stock since its late 2011 IPO. Notice the move from $20 to $100 by early 2014:
Here is Coach stock — now called Tapestry (TPR)– since its IPO in 2000. In this case there were two separate astronomical run-ups, neither of which could be maintained.
Abercrombie and Fitch (ANF) was scorching hot when I was in high school in the late 1990s: