Paul,
> Is there a point in time at which > the shorts take over from the longs?
In case of IOM, it broke when it did not deliver revenue and earnings growth. AMZN does not have earnings, so it may break down on revenue growth slowdown. AMZN got onto the annualized $1 bln. sales last year. BKS has approximately $2.7 bln. annual sales. Assuming that AMZN does not take over other retail markets (CDs, PCs, beanie babies, etc.), and that it grows to BKS revenue, and that it has to deliver 50% revenue growth per quarter to satisfy the "investors", it will take another year for it to reach the BKS sales. So in this case there will not be a disappointment this year. However, this model is totally baseless. The break may come much earlier or a bit later. If you really want to short it, wait for the disappointment to happen and act then. You will lose ~20-50 points, but you may make money.
On the other hand, if you compare Internet to biotech bubbles you'll notice that these break totally on investor sentiment. But they usually don't have neither earnings, nor revenues, so it's a bit different game.
BTW, in all questions of shorting, consult John G (https://www.siliconinvestor.com/profile.aspx?userid=93590). He is a professional hedger, and his threads on high-flyers and broken stocks are excellent reads. Personally, I'd rather short broken stock than a high-flyer. But then, I wouldn't short at all. ;-)
Good luck
Jurgis |