By Tanya Agrawal
(Reuters) - Wall Street was set to open higher after data showed that the U.S. private sector added more jobs than expected in May and the European Central Bank left interest rates unchanged at record lows.
U.S. private employers added 201,000 jobs last month, a report by a payrolls processor ADP showed, higher than the 165,000 additions in April and economists' estimate of a gain of 200,000 for May.
The data is a precursor to the U.S. Labor Department's non-farm payrolls report on Friday, which includes both public and private-sector employment numbers.
"There was nothing disturbing in the numbers," said Mark Luschini, chief investment strategist at Janney Montgomery Scott in Philadelphia.
"The number is strong enough to create some sensitivity around the timing of a rate hike in the second half of the year."
The ECB's decision to leave rates unchanged was widely expected after the central bank cut rates to rock-bottom levels last September and said they had hit "the lower bound".
U.S. trade deficit narrowed 26.6 percent in April, the largest decrease since early 2009, as exports of services hit a record high and imports fell.
Investors have been keeping a keen eye on economic data for clues on the timing of a rate hike by the U.S. Federal Reserve - the first in nearly a decade.
Also due on Wednesday is the Institute for Supply Management's non-manufacturing index for May at 10:00 a.m. ET (1400 GMT).
At 8:56 a.m. ET, S&P 500 e-minis
Synchronoss Technologies'
Vera Bradley
Wendy's
GoPro
(Reporting by Tanya Agrawal; Editing by Ted Kerr and Savio D'Souza)