Fed Chair Jerome Powell said in his post-Fed meeting press conference that its not appropriate to raise rates while taper is ongoing. 

Additional takeaways: 

"We have learned regards balance sheet is best to adjust methodically due to market sensitivity."

"We talked today about the balance sheet

"Have not taken a position on whether should pause between the end of the taper and first rate hike."

"We discussed the sequence of events regarding balance sheet runoff last time."