Wall Street slipped overnight as a drop in shares of IBM on disappointing earnings outweighed those that beat expectations such as United Technologies and Travelers.
In New York trading at about 1.36pm, the Dow Jones industrial average slipped 0.13 percent, while the Standard & Poor's 500 Index dipped 0.14 percent, and the Nasdaq Composite Index fell 0.50 percent.
In the Dow, declines in shares of IBM and those of Merck, last down 5.8 percent and 1.8 percent respectively, outweighed increases in shares of United Technologies and those of Travelers, last up 5.1 percent and 2.5 percent respectively.
United Technologies shares climbed after the company announced a new US$12 billion share buyback programme.
"United Technologies' shares are an attractive investment opportunity which we are going to take advantage of in order to increase value for our shareholders," Gregory Hayes, UTC chief executive officer, said in a statement. "Including the US$4 billion in repurchases made to date in 2015, we now expect to complete US$16 billion of share repurchases through 2017."