[allmost]

"Now the word is that zero-percent interest rates are just too darn high. That's why we haven't seen a reinflation of bubble America. The Financial Times reports the existence of a Federal Reserve staff memorandum that makes the case for a negative-five-percent federal-funds rate.

Hard to wrap a partially functioning brain around that.

[Pessimist]

Not really. 5% inflation with 0% interest rates = -5% real interest rate.