"We have no choice but to acknowledge the risks, and to report that financial markets are reacting to them".
"The strong global economy driven by strong earnings is really helping to minimise some of these concerns".
Dow e-minis were down 24 points, or 0.11 percent, with 22,166 contracts changing hands.
The S&P fell as much as 0.52 per cent at its session low.
In Europe, the pan-continental STOXX 600 index lost 0.8 per cent, with falls deepening after reports a vehicle had rammed a group of soldiers in Paris, injuring six.
Ryu Yong-seok, a market analyst at KB Securities Co., said North Korea risks could continue to weigh in the main index, though there are no negative factors that could undermine South Korea's economic fundamentals.
When the rhetoric between the two leaders heated up, investors were scurrying for safe haven currencies, including the Yen and the Swiss Franc, which surged about 1.1% on Wednesday.
While some investors anxious about the growing tension between the United States and North Korea have been busy driving up the price of gold, deVere Group strategist Tom Elliott has another idea: make sure your investments "remain diversified".
"Amid tensions in the global arena, it's hard to seek higher prices ahead of three days of holidays", Kawaguchi said.
Those with an eye on the credit markets probably had an easier time navigating the carnage.
United States missile shield not certain to protect Guam from North Korea
US Secretary of State Rex Tillerson sought to calm tensions after Trump's remarks, saying "Americans should sleep well at night". The U.S. recaptured the territory three years later.
The pan-European FTSEurofirst 300 index lost 1.06 percent and MSCI's gauge of stocks across the globe shed 0.17 percent.
Sterling edged back above the 1.30 mark against the Dollar on Wednesday, having slid by around half a percent a day previous on expectations for a delay in the Bank of England's interest rate hike timetable. The USD/JPY pair was trading at 110.072 Yen, up 0.13%. Japan is the world's biggest creditor country and there is an assumption that investors there will repatriate funds in a crisis. The demand for the Swiss franc also rose, with the franc strengthening against the dollar and the euro.
The yield on the benchmark 10-year U.S. Treasury note fell to 2.253 percent from its U.S. close of 2.282 percent on Tuesday.
Foreign investors are expected to keep selling South Korean stocks for the time being as rising tensions on the Korean Peninsula have further strengthened their appetite for profit-taking, analysts said Friday.
Oil prices rose after a report showed United States refineries processed record amounts of crude in the latest week, eating into inventories. October Brent crude fell $0.80, or 1.5%, to $51.90 a barrel.
In the first four days of the week, the Standard & Poor's 500 index swung from marking its latest record high to posting its biggest single-day drop in almost three months.
At 3:25pm BST, spot gold was selling at $1,286.73 an ounce, up 0.74% or $9.43, holding firm near two-month highs for the physical market in both London and Dubai.
The Australian dollar, which rose to a 19-month high near 90.00 yen late in July, was down 0.6 percent at 86.77 yen after slipping to a one-month low of 86.23 yen.
Wilmar International slipped 6.4 per cent or 22 cents to $3.20; Hongkong Land lost 2.1 per cent or 16 usa cents to US$7.34.
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