U.S. stock futures pointed to a lower open on Wall Street on Tuesday, with Greece jitters expected to weigh on sentiment ahead of the start of two-day Federal Reserve meeting.
The U.S. central bank is not expected to announce any changes to its monetary policy this week, but talk that the Fed could lift interest rates in September for the first time since 2006 is growing amid improving economic conditions. And that means the Fed's post-meeting statement on Wednesday is likely to be scrutinized closely.
Greece is also expected to remain in the spotlight on Tuesday, with the country's Prime Minister Alexis Tsipras on Monday blaming creditors for the collapse of talks on unlocking aid for reforms at the weekend.
The impasse has raised concerns that Athens is heading for a debt default that could end with it leaving the euro zone.
Greek jitters continued to undermine global markets, with European stocks trading lower on Tuesday and Asian shares closing broadly in the red.