Negative interest rate

Japan's stock market is at a six and a half month high. And that's in part thanks to expectations that Japan's version of the Federal Reserve is about to get aggressive by setting negative interest rates, to get investors to stop putting their money into government bonds.

The Federal Reserve meets again this week, and the buzz is that Chairman Ben Bernanke could be considering some "new tools," for stimulating growth -- perhaps using interest rates to encourage banks to take some risks with their money.