but seriously, the current rate of return is more important than the relative rate of return on your entry price.
if i buy at $20 and recieve a 10%dividend($2). then shares price rises to $40 and my dividend is still $2 (but now only 5%). why should i continue to think about me entry price? surely i can sell and find another stock paying the 10%. my capital may be better elsewhere.
I'm not sure I follow this.
Why wouldn't you continue to work out the yield based on your entry price? Especially if the yeild is the reason you brought in the first place. Isn't it all about return on your invested capital?
If I'm earning a 10% d/e on my intial entry price why would I sell just because the SP has doubled? If anything that is more reason to continue to hold, I'm still receiving 10% pa return on my money and that isn't easy to beat. The only time I would look to sell is if the d/e is reduced significantly. Also if the d/e is raised you get an even better return on your money.