This story is developing. Please check back for further updates.
Click here for the latest on the markets.
The pay gap between bosses and their workers has increased in every region worldwide since the 2008 financial crisis, according to the latest data.
"There are few benefits and significant risks to increasing interest rates prematurely," said Chicago Fed President Charles Evans.
Kansas City Fed President said the central bank should raise interest rates in the middle of this year.
A gauge of growth in the U.S. services sector was modestly stronger than expected in February.
Get the best of CNBC in your inbox