Dow futures traded 5 points lower, with share of both Visa and Pfizer climbing in the premarket.
While the Fed is not expected to raise rates following its two-day meeting, many market participants believe the central bank will announce the unwinding of its $4.5 trillion portfolio.
Investors will also see existing home sales for August released at around 10 a.m.
In oil markets, Brent crude traded at around $55.79 a barrel on Tuesday morning, up 1.18 percent, while U.S. crude was around $50.06 a barrel, up 1.17 percent.
Oil prices rose on Wednesday after the Iraqi oil minister suggested OPEC and its partners were debating whether to extend or deepen supply cuts in order to clear a global overhang.
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