The exchange rate is 1 bird in hand = 2 birds in bush
so you think, 2 birds in hand = 4 in bush.So you pick up a second bird and the value of your portfolio increases...
but then, as you attempt to balance 32 birds on your shoulders, you realize the exchange rate has reversed
and you would rather watch a flock of 16 in the bush than be covered in birds
@shel
okay, two things:
one, I would love to be covered with birbs.
two, the problem here is that they're no longer in the hand. you have failed the definition, and so any analyses thereafter are irrelevant to any hand-bush-birb discussions.
so there!