Lockheed Martin, Raytheon, General Dynamics and Northrop Grumman and the Dow Jones U.S. defense index was up 1.48 percent after hitting a record high. The Nasdaq composite lost 36 points, or 0.6 percent, to 6,315.
The influential financial stocks were among the biggest drags on the index, with Royal Bank of Canada down 1.5 percent to C$92.88, and Manulife Financial Corp falling 4.7 percent to C$24.43, its largest drop since early August previous year.
The indicated USA market moves reflect a selloff across global stock markets Friday.
Simmering tensions between the U.S. and North Korea have come back to the boil in recent days after Pyongyang disclosed plans to fire missiles over Japan to land near America's Pacific territory of Guam.
The VStoxx Index of euro zone volatility gained 2.1 per cent, reaching its highest level since April.
ANALYST'S TAKE: "The tensions between North Korea and the U.S.is an excuse for profit-taking", Seo Sang Young, an analyst at Kiwoom Securities.
Trump warns NKorea that United States is 'locked and loaded'
North Korea responded by detailing a plan to fire ballistic missiles toward the USA territory of Guam, home to US military bases. Trump dialed up the rhetoric early Friday, tweeting that the US military is "locked and loaded, should North Korea act unwisely".
"If the USA and South Korea carry out strikes and try to overthrow the North Korean regime and change the political pattern of the Korean Peninsula, China will prevent them from doing so", the editorial's authors said.
Away from geopolitics, Graham Bishop, investment director at Heartwood Investment Management, said price action overall has been muted when companies have beat estimates in the latest reporting period, but then "altogether painful" when they miss.
The Nasdaq Composite, meanwhile, was facing its worst week since the one ended December 2, which logged a loss of just over 2%.
"U.S. tech is a case in point".
Data on tap: The Labor Department will release July data on consumer-price inflation at 8:30 a.m. Economists had expected prices to rise by 0.2%.
Such an outcome would normally boost the USA dollar, Spivak said in a note. The index had its biggest drop since mid-May a day earlier.
Transocean Ltd. (RIG) Upgraded by Goldman Sachs Group, Inc
The stock witnessed 1.36% gains, -26.17% declines and -37.98% declines for the 1-month, 3-month and 6-month period, respectively. They now have $9.75 target price on the offshore drilling services provider's stock, up from their prior target price of $8.57.
United Kingdom mid-cap stocks also came under pressure, falling 0.8 per cent as shares in Dixons Carphone slumped more than 7 per cent to their lowest level since the aftermath of the Brexit vote last June. Domino's Pizza also fell after the takeaway firm agreed a partnership with its London franchise business.
Nordstrom Inc.(JWN) shares rose 1.6% after the retailer late Thursday posted earnings that beat expectations (http://www.marketwatch.com/story/nordstrom-shares-rise-after-retailer-tops-views-sales-rise-2017-08-10), along with a sales rise.
"While it appears that Pyongyang's detailed strike plan against Guam has created a sour backdrop to trading, it's worth noting that US/North Korea tensions aren't having quite the same effect on the DAX and CAC", said Spreadex analyst Connor Campbell.
There had earlier been falls of almost 2% on South Korea's Kospi and Hong Kong's Hang Seng, with markets in mainland China and Australia also down.
Investors bought safe-haven assets such as gold, helping the precious metal touch a two-month high, and the Japanese Yen rose.
Amazon Advises Against Using Brand of Solar Eclipse Glasses on Site
The last coast-to-coast eclipse was in 1918, and after this one, the next won't come until 2045. On March 7, 1970, the path of totality ran up the east coast of the United States.