The U.S. is not in a bubble

The U.S. is not in a bubble

but not mean everything is fine.

America's four living Federal Reserve chairs say the U.S. is not in a bubble, but that doesn't mean everything is fine.

And Current Federal Reserve chair Janet Yellen’s top concern is the health of the rest of the world. She said the U.S. is "suffering from a drag from the global economy."The Fed didn't raise interest rates in March and almost certainly won't do it at its next meeting in April because of the weakness abroad.