New York - US stocks opened higher on Wednesday ahead of a Federal Reserve policy statement while microblogging company Twitter and online listings site Yelp plunged on disappointing earnings reports.
Five minutes into trade, the Dow Jones Industrial Average stood at 17 659.53, up 29.26 points.
The broad-based S&P 500 added 0.18% at 2 097.10, while the tech-rich Nasdaq Composite Index gained 0.29% to 5 103.72.
The Fed statement, to be released at 20:00, is not expected to include any major shifts but could give clues on when the US central bank expects to hike interest rates, expected later in 2015.
Twitter sank 9.7% as executives warned of slow user growth, while Yelp dived 27.7% after projecting third-quarter revenues of $139m to $142m, well below analyst expectations of $152.6m.