In addition to our monetary policy responsibilities, the Federal Reserve works to promote financial stability, focusing on identifying and monitoring vulnerabilities in the financial system and taking actions to reduce them. In this regard, the Committee recognizes that an extended period of low interest rates has the potential to induce investors to "reach for yield" by taking on increased leverage, duration risk, or credit risk
افادة جانيت يالين كاملة على الرابط التالي
http://www.federalreserve.gov/newsev...n20140507a.htm