How to answer any eco-financial problem

The wonders of supply and demand

Though the diagram more or less explains it, here's the gist of it.

1) Start by discussing the problem, maybe by repeating the definition.
2) Try to link it to the Supply and Demand concept.
3) For added effect, link it to an existing economic issue, like the sub-prime crisis or the P-Notes issue.

The interviewer is likely to be impressed! While you're digesting this, read the previous post as well.