Wall Street was mixed overnight amid concern about rising international tensions after Turkey downed a Russian military plane near its border with Syria, offsetting fresh evidence of better-than-expected US economic growth.
In New York trading at about 12.07pm, the Dow Jones industrial average eked out a 0.05 per cent gain. At about 11.52am trading, the Standard & Poor's 500 Index fell 0.15 per cent, while the Nasdaq Composite Index declined 0.34 per cent.
"This has really gotten investors' attention," Jack Ablin, chief investment officer at BMO Private Bank in Chicago, told Reuters. "Investors are worried that tensions could escalate."
Airline stocks fell after the US yesterday issued a global travel alert for Americans because of "increased terrorist threats".
In the Dow, gains in shares of Chevron and those of Exxon Mobil, last up 2.3 per cent and 2.1 per cent respectively, offset slides in shares of Merck and those of United Technologies, last 1.4 per cent and 1.1 per cent lower respectively.
Shares of Chevron and Exxon Mobil rose with the price of oil, which climbed on the incident between Russia and Turkey. Benchmark Brent rose to a two-week high of US$46.50, while US crude's West Texas Intermediate futures touched US$43.46 earlier in the session.