U.S. stock index futures were wavering along the flat-line as investors awaited a key reading on U.S. non-manufacturing sector.
Futures for the S&P 500 edged up 0.50 points to 1826.00 points while those on the Nasdaq index added 2.00 points to 3533.50 points.
The Institute for Supply Management’s non-manufacturing index for December is due at 10 a.m. Eastern time.
At the same time, a report on factory orders is due.
No major corporate event is due today.
Investors would also likely take cues from Asian markets where bourses closed with sharp losses earlier in the day.
Tokyo's Nikkei led the losses, down 2.3% on the first trading day of 2014 as investors reacted to weak data out of China.
Among other indexes, the Shanghai Composite lost 1.8% while Hong Kong's Hang Seng declined 0.6%.