_croz
> Just choose to invest in literally anything else that doesn't have a known negative ROI.
A fund manager who is responsible for creating a product that matches government bonds can't buy something else because it would no longer be what it is intended to be: a product which behaves according to how the underlying asset behaves.
Investors however, will buy other (riskier) products because it doesn't make sense to buy something with zero or negative interest, which puts more money into less safe hands, hence the talk about bubbles. If the only thing that is offering any return is a ponzi scheme and everyone is invested in it because nothing else is offering return, then it's going to end badly for a lot of people.
You provide them with the "I didn't vomit in your car" service.
Professional traders like this cat?
http://www.npr.org/blogs/money/2013/01/14/169326326/housecat...