"The US economy has made tremendous progress in recovering from the damage from the financial crisis. Slowly but surely the labor market is healing. For well over a year, we have averaged about 225,000 jobs (gains) a month. The unemployment rate now stands at 5%. So, we're coming close to our assigned congressional goal of maximum employment. Inflation which my colleagues here, Paul (Volcker) and Alan (Greenspan), spent much of their time as chairmen bringing inflation down from unacceptably high levels. For a number of years now, inflation has been running under our 2% goal, and we are focused on moving it up to 2%. But we think that it's partly transitory influences, namely declining oil prices and the strong dollar that are responsible for pulling inflation below the 2% level we think is most desirable. So, I think we're making progress there as well. This is an economy on a solid course - not a bubble economy. We tried carefully to look at evidence of potential financial instability that might be brewing and some of the hallmarks of that - clearly overvalued asset prices, high leverage, rising leverage, and rapid credit growth. We certainly don't see those imbalances. And so although interest rates are low, and that is something that can encourage reach for yield behavior, I certainly wouldn't describe this as a bubble economy." 

-Janet Yellen, April 7, 2016, International House: "A Conversation with Janet Yellen, Ben Bernanke, Alan Greenspan and Paul Volcker"