Great discussion Bill.
I would make a couple of points:
1. You mentioned Amcor had traded in a range of $7.80 to $9.00. Sounds about right. Let's firstly clarify that this has NOT generally been a direct fall from $9.00 to $7.80 but rather a 'fluctuation' throughout this range. Indeed as of Friday it was $8.19 and may well go up a little more today. Therefore, depending on when you bought and sold within this period it would indeed seem possible that profits could have been made.
2. You also said "Some unknown factor is occurring if the price goes down". (Excuse me if that wasn't a direct quote.....I think it was pretty close).
'Efficient Market'? I don't know. Even with my EXTREMELY limited knowledge of the stockmarket I continually see the price of individual shares fluctuate totally independent of the fundamentals of the company(You did mention Buffett :; )
Helicopter down in the middle east and the price of a container manufacturer falls. Huh?
It would appear to me that a not insignificant part of share prices are about 'sentiment' and sentiment is about how people are feeling at the time........and being 'people', most do the same thing at the same time.
I know this is simplifying(possibly oversimplifying?) things but combining both of these points could also mean that buying certain shares when they are falling may not necessarily be so DUMB afterall. Please note I said 'some shares'
I do have a general question though(for anyone?) which has been rattling around my thick old head lately, and that question is to do with a stocks current value. Having a reasonably good knowledge of its 'current value' could certainly influence some of your buying and selling decisions.
What is the most sensible way of evaluating this figure and for your 'average Joe' investor, where can such valuations be obtained at a reasonable price?
'Intrinsic Value' from someone like Benjamin Graham that takes into account EPS/EPS Growth and Bond Yields is one possibility, but even this throws up some pretty unrealistic figures on occasions.
While buying against market sentiment may(or may not?) be sensible I think it would be agreed that the 'true value' of a share will change over time and factoring this value into your decision making process would be sensible.
I may well be asking the unanswerable question. Any takers?