Hi Denny, I think that that is price anchoring. The price is what it is. It has no memory of where it came from. Waiting for it to go back instead of selling can represent a large opportunity loss.
You are on the same wavelength as Chris who wrote:
The third aspect is opportunity cost. If you are hoping for a recovery what other, better investments could you switch in to that you think will perform better than the company that you hope will recover.
And while I don’t disagree bringing it up makes a difficult choice more complicated. My point is to disengage buying from selling, each is difficult enough without having to pair them. 
What I do, and I brought this innovation late to my game, is to have a buy wish list. Whenever I have enough cash to buy something, I pick it from my wish list. This solves the problem Fool zuzu3 brings up: “mandated to come up with two new stocks to recommend each month.” I “come up” with recommendations when I find them and add them to the wish list. When I have cash they have to fight it out to get bought. In my initial post I wrote as reasons to sell: “Insufficient expectations for the future or excessive uncertainty.” That’s opportunity loss! But it’s asynchronous from picking stocks to buy.
It’s the same recommendation but a different way of doing it. A stock only makes it to my wish list if I expect it to grow fast.
Denny Schlesinger