But as an investment that would mean if you bought at $1.50 you should keep on holding on to 30c because one day the price COULD get back to $1.50.
Sounds like a bogus strategy to me.
How about buying when there are clear signs of a recovery in the price of iron ore. Sure you'll miss the bottom slice of the sandwich (30c to 60c) but you're sure then to get the filling (60c to $1.50) and won't be waiting years to do so.
At the same time you'll be removing risk of losing all of you money.