U.S. stock index futures pointed to a flat open on Wednesday as traders focused on a slew of company earnings and the latest oil inventory data.
Allergan, GlaxoSmithKline, Time Warner and Alaska Air are among the major companies that reported earnings before the bell. Whole Foods, CenturyLink, Fiserv and Prudential Financial are all due to report after the market close.
There are no major economic data releases scheduled on Wednesday.
In Europe, the pan-European Stoxx 600 index was around 0.36 percent higher on Wednesday. In Asia, the Shanghai Composite in China closed 0.46 percent higher, while the Nikkei in Japan closed 0.51 percent higher.