The economic calendar in the U.S. on Wednesday also includes the ADP National Employment Report for April at 8:15 a.m. EDT, the ISM Non-Manufacturing Index for April at 10 a.m., and Oil Inventories for the week ended April 28, at 10:30 a.m.
Oil prices were rebounding after crude prices on Tuesday hit their lowest levels of the year. Early Wednesday in the U.S. crude oil gained 1% to $48.13 a barrel.
2. -- Apple (AAPL) shares fell 1.8% in premarket trading on Wednesday after unit sales for the iPhone declined in the tech giant's fiscal second quarter.
Apple earned $2.10 a share in the quarter, ahead of analysts' forecasts of $2.02 a share, while revenue of $52.9 billion slightly missed estimates of $53.04 billion.
iPhone revenue rose 1% annually to $33.2 billion (63% of total revenue), with unit sales dropping 1% to 50.8 million. Analysts were looking for iPhone sales of 52.3 million.
Services revenue rose 18% to $7.04 billion (13% of revenue), which was slightly below consensus of $7.06 billion.
Apple said it expects revenue for the quarter ending in June of $43.5 billion to $45.5 billion, which falls short of the $45.63 billion consensus.