U.S. stock index futures were slightly higher on Monday as investors awaited data that may feed into the Federal Reserve's plans to raise interest rates this year.

A decline in energy and healthcare stocks weighed on Wall Street on a relatively quiet Tuesday as investors awaited the outcome of the U.S.

Wall Street was lower on Tuesday as oil prices slipped and weak Chinese data rekindled fears of a global economic slowdown led by the world's second-biggest economy.

Wall Street was set to open lower on Monday after the S&P 500 and the Dow recorded their first four-day winning streak in about five months last week.

U.S. stock index futures fell on Monday as investors worried about the Federal Reserve pressing ahead with its plan to raise interest rates this year. 

U.S. stocks were lower at the open on Wednesday as crude prices slid after top producer Saudi Arabia ruled out production cuts to help tackle a global glut.

Wall Street was on track to open sharply higher on Monday as prices of crude oil and other commodities surged, pointing to an uptick in investors' risk appetite following a rout in global markets.<

Wall Street fell sharply in early trading on Monday, continuing a technology-led selloff from Friday, as fears of a worsening global-economic slowdown and dropping oil prices continued to rattle in

U.S. stock indexes were lower on Monday morning, led by materials and energy stocks, after last week's rally in oil prices fizzled out.