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.

Chinais a world class if not the world class property bubble, primarily high-rise buildings, offices and condos.

What people don't realize is that China papered over its last two credit bubbles, those in 1999 and 2004. The banks were never bailed out - they just exchanged their bad loans for questionable bonds from quasi-state organizations.

In China, remember, the the banks are arms of state policy. They loan because the local party official or regional party official tells them we need a new stadium. They are instruments of state policy.

What American people and what the markets want is a fair and level playing-field, where the rules are clearly elucidated, where the referees are competent, and where we know that the game is not rigged.

Healthcare is growing now at about 10 per cent per annum in the U.S. top line, versus 3 per cent for the economy. As someone with a sharp pencil and an eye for this kind of thing, this can't last.

I'll always understand the Schadenfreude aspect to short-selling. I get that no one will always like it. I'm also convinced to the deepest part of my bones that short-selling plays the role of real-time financial watchdog. It's one of the few checks and balances in the market.