The figures came as dealers sat on their hands ahead of “one of the most uncertain meetings in recent Fed history”, according to UBS economist Themos Fiotakis.
Fed chairman Janet Yellen was expected to hold rates at their record low tonight while leaving a December rise on the table.
“Rarely has there been such a divide in opinion among market participants on what the Fed is most likely to do,” Fiotakis said.
“US data have sent mixed signals, China risks have intensified and US financial conditions have unexpectedly tightened.”