Janet Yellen sticks with plan to hike rates — but that can change, she tells Congress

Federal Reserve Chair Janet Yellen said the U.S. economy faces a number of global threats that could hamper growth, but is still sticking to a plan of slowly hiking interest rates back to a more normal level over time. In her semiannual report to Congress, Yellen spoke about the widening fallout from concerns over China's weaker currency and economic outlook, which is rattling financial markets around the world. Since Yellen moved to hike rates for the first time since 2006 in December, oil