What we define as a bubble is any kind of debt-fueled asset inflation where the cash flow generated by the asset itself - a rental property, office building, condo - does not cover the debt incurred to buy the asset. So you depend on a greater fool, if you will, to come in and buy at a higher price.

There's almost 70 billion in square feet under construction in high rises in commercial, residential and light manufacturing. And we estimate about 30 billion square feet, and that's with a 'B,' is commercial, that we would just consider office space. To put that in perspective, that's a 5x5-foot cubicle for every man, woman and child in China.

The interesting thing about the China story, getting back to the macro and micro, and as dire as I think the macro story is - due to bad credit and credit extension that makes Greece and Spain and the U.S. look like child's play - when you get to the micro of individual companies, they look even worse.

Derivatives in and of themselves are not evil. There's nothing evil about how they're traded, how they're accounted for, and how they're financed, like any other financial instrument, if done properly.