U.S. stock-index futures gained on Tuesday as traders awaited the start of the U.S. Federal Reserve's two-day meeting.
The central bank will make a policy announcement on Wednesday at the end of the meeting. Market consensus is for the Fed to hold its base rate in the 0.25-0.50 percent range and not lift again until December.
The Bank of Japan will also meet on Tuesday and make an announcement on Wednesday. There is speculation the Japanese central bank could cut interest rates further into negative territory.
On Tuesday, attention will be on U.S. housing starts and building permits data for August — which showed a drop — as well as oil prices. U.S. stocks on Monday gave up gains when crude turned lower. U.S. equities closed mostly flat on Monday after a choppy session.