U.S. stock index futures pointed to a slightly higher open on Tuesday as traders geared up for the start of earnings season and eyed economic data.
On the data front, the NFIB's small business survey results for December showed sentiment soaring to a 12-year high. Wholesale trade and job openings and labor turnover survey (JOLTS) for November are slated for release at 10 a.m ET.
On the earnings front, tech company Synnex is due to report after the market close. Financial giants Bank of America, BlackRock and JPMorgan Chase are among the companies slated to report later this week.
In Europe, the pan-European Stoxx-600 index was around 0.07 percent higher on Tuesday. In Asia, the Shanghai Composite in China closed 0.29 percent lower, while the Nikkei in Japan closed 0.79 percent lower.
Oil prices, meanwhile, inched higher as investor optimism increased that both OPEC and non OPEC producers would stick to a planned production cut. Brent crude traded at around $55.10 a barrel on Tuesday, up 0.29 percent, while U.S. crude was around $52.10 a barrel, up 0.3 percent.