Wall St. turns positive after Yellen comments

By Abhiram Nandakumar
(Reuters) – Wall Street swung into positive territory on Tuesday after U.S. Federal Reserve Chair Janet Yellen said it was appropriate for the Fed to proceed “cautiously” in raising interest rates.
Global developments and risks have led policymakers to project slower path of rate hikes than initially expected in December, Yellen said.
Yellen, speaking in New York, said global risks remain, including uncertainty over China and path of oil prices.
The centr