Qualcomm (QCOM.O) shares staged a short-lived rally, currently up 1.6%.

【股指期貨早盤開盤】滬深300股指期貨（IF）主力合約跌0.93%，上證50股指期貨（IH）主力合約跌0.25%，中證500股指期貨（IC）主力合約跌1.24%，中證1000股指期貨（IM）主力合約跌0.98%。

Federal Reserve Chair Kevin Warsh reiterated he will not provide forward guidance on upcoming interest-rate policy, calling the move a major shift. He said the Fed will "open a new path" and expects a full "internal debate" at the policy meeting in four weeks. Last month Warsh said policymakers agreed forward guidance is not suitable for the current policy environment. In June he established five special working groups — one to study communications — with the others focused on the balance sheet, use of data, productivity and employment, and the Fed's inflation framework.