Investors also awaited quarterly earnings reports from BlackRock BLK.N, Domino's Pizza DPZ.N, Walgreens Boots Alliance WBO.O and Delta Air Lines DAL.N. All three major indexes slipped in the previous session after minutes from last month's Federal Reserve meeting showed policymakers agreed they needed to maintain a more restrictive policy stance. Adding to the nerves, data on Wednesday showed U.S. producer prices increased more than expected in September amid strong gains in the costs of services and goods, suggesting inflation could remain uncomfortably high for a while.