Dunno no mati kayu.

Seriously avoid thinking of opportunity costs.
It's bad mindset to have when you play stocks.
What could happen?
Remember the bird in hand and the bird in the bush?
Exactly!
This is what you will think off when you focus on opportunity costs.
You hold this stock...
suddenly within one week, you think that stock is better.
Then you switch.
the stock you newly buy, no jalan.
the stock you sold, flew.
It will continue to happen every time you think of opportunity costs...
You will not be contended with what you have...
you keep thinking of 'what if I buy the other stock....
and this cycle will not end.
EAH flew...

thanks to naughty article on Business Times....