The Fed has sharpened its focus on financial stability since the crisis
She said any future changes should remain 'modest'
However, she said that a number of US trading partners continue to confront economic challenges
Yellen said the economy is healthy enough to absorb further gradual rate increases
According to Yellen's testimony economy is currently on an even keel, near or beyond full employment
The S&P 500 and Nasdaq posted their sixth consecutive week of gains this week
The Fed has forecast three rate increases this year on the back of the low unemployment rate & rising inflation
She flagged considerable uncertainty over economic policy under the Trump administration
Fed last month raised its short-term interest-rate target for only the second time in a decade
Economy "is doing quite well" but "there are quite serious problems" in the long term, she said
The unemployment rate, now at 4.6%, which is near what it was before the recession, says Janet Yellen
This is a very modest adjustment in the path of the fed funds rate, and involves changes by only some of the participants
Janet Yellen said existing banking rules could be tweaked but that they are mostly a benefit
Donald Trump had said that he would replace Fed Chair Janet Yellen when her term expires
Yellen said the economy appeared on track to grow moderately, which would help bring about full employment and push inflation toward the Fed's 2% target
In a wide-ranging speech, Janet Yellen said the Fed was struggling to understand the behaviour of the labour market and the weakness of inflation
US stocks posted further gains after Yellen's remarks, while the dollar dropped and Treasuries rose, pushing yields on the 2-year note to session lows
Minutes released Wednesday showed "several" indicated it would be appropriate to raise rates "relatively soon"
The Fed is divided enough ahead of its rate meeting that a nudge from its most influential policymaker could make the difference
Fed Chair Janet Yellen devoted the final page of her keynote talk on possible monetary policy reforms to a list of fiscal and structural policies