Wall Street moved higher overnight, following last week's slide, as investors bet that the economic impact from the Islamic State-backed assaults in Paris would be limited.
France attacked Isis targets in Syria for a second day after assaults in Paris killed at least 129 people.
"You wouldn't expect the attack to have a lasting impact on financial markets," Frances Hudson, an Edinburgh-based global thematic strategist at Standard Life Investments, told Bloomberg. "It might be that the markets start looking again at fundamentals and company news. The US was off quite a long way on Friday. You would expect to see a bit of recovery from there."
In New York trading at about 12.48pm, the Dow Jones industrial average rose 0.61 per cent. At about 12.34pm, the Standard & Poor's 500 Index gained 0.62 per cent while the Nasdaq Composite Index added 0.20 per cent.
Gains in shares of UnitedHealth and those of Exxon Mobil, last trading at 2.1 per cent and 1.8 per cent higher respectively, helped propel the Dow higher.