Among other companies that reported earnings, Starbucks Corp SBUX.O fell 2.8% after it lowered its fiscal 2021 forecast for China sales growth as COVID-19-related restrictions loom longer than expected. Apple Inc AAPL.O slipped 1.1% in premarket trading after it forecast slowing revenue growth, as global chip shortage bit into its ability to sell Macs and iPads. The Fed's policy-meeting outcome is in focus as investors seek hints on the central bank's plan to taper its large asset purchases programme, amid risks of a COVID-19 resurgence in the United States and rising inflation.