As US unemployment continues to head south towards its natural rate, and the prospect of an interest rate spike is a possibility, there is one factor that may avert, or at least moderate, an interest rate spike: The yen tsunami, i.e.

FORBES: What May Keep US Interest Rates From Spiking

The Fed may not be able to find a solution quickly due to a division among participants over the natural rate of unemployment and how flexible the FOMC should be with its inflation target, Nomura said.

FORBES: Deep Discussions But No Action Expected At Two-Day FOMC Meeting