Fed's Yellen: There is a "great deal of uncertainty" on Trump's economic policies

During a Q&A session after her speech at the Executives Club of Chicago, Fed's Chairwoman Janet Yellen said that China, Japan and Europe are all showing positive data.

Key quotes (via Bloomberg TV):

• The most the Fed can do is help to pull in discouraged workers
• US economy's potential to grow looks to be about 2% unless labor force grows faster
• Central bankers understand linkages between countries
• Nothing I said today is based on fiscal policy changes
• China's management of its currency is now better understood and that's reduced volatility