Tiger's Robertson: Stock bubble sparked by central bank "collusion"

Hedge fund manager Julian Robertson believes there is a global stock market bubble that has been created by artificially low interest rates throughout the world, according to comments made today at the CNBC Institutional Investor Delivering Alpha conference:

"It's the Federal Reserve's fault, and the Federal Reserves all over the world. I mean, in Germany, in order to buy a bond, until recently, you actually had to pay interest. And, you know, that's certainly going to discourage a lot of people from doing so... There's been collusion all over the world, let's get interest rates down."