St. Louis Fed President James Bullard stopped by Business Insider to talk about the Fed's decision not to raise rates in September. Bullard does not have a vote on the Federal Open Market Committee this year, but argued against the decision to keep rates near zero.

The most notable part of Federal Reserve President Janet Yellen's news conference was when she responded to a question by saying she couldn't rule out keeping rates near zero forever.

We asked Bullard why having a zero-interest-rate policy forever was a bad idea. He made a strong argument by pointing to Japan.