[tspiteri]

I'm not so sure it would work like that; the costs of mining an asteroid are a bit too high for that. Mining in space is not even new yet, it is still a plan, and if it goes according to plan, it will still be very expensive, and there will be limitations in the system that limit the speed with which the metals are brought to earth.

My guess is that in the initial stage their profit margin would be low, or they'd have to work at a loss, if they have to compete with current prices. As scarcity drives the prices further up and their technology improves, their profit margins would soar, but that would only happen in the long term. Only then would supply start bringing the prices down.