U.S. stocks were mixed on Tuesday, after attacks on major oil refineries facilities in Saudi Arabia, that refreshed supply fears, pushing crude futures to their sharpest one-session rally for the first time in more than a decade.
Meanwhile, investors are awaiting the Federal Reserve meeting due to hold later on Tuesday, from which it is expected to slash cut interest rates by a quarter of a percentage point on Wednesday.
The Dow Jones diminished by 0.12 percent, to 27,045, the S&P 500 index added 0.03 percent, to 2,998 and the Nasdaq Composite index grew by 0.04 percent, to touch 8,157 at 15.25 GMT.
On the corporate side General Motors shares gaine 0.89 percent, as strike continues for the second day.
Corning shares tumbled by 7.13 percent after company cut its full-year outlook.
KLA Corp securities jumped by 2.10 percent, after the company increased its dividend by 13 percent and announced an additional $1 billion in share repurchases.