Dow e-minis 1YMc1 were down 54 points, or 0.25 percent, with 25,272 contracts changing hands. Earlier, the average had been down more than 88 points.
The euro fell a quarter-of-a-percent against the dollar to trade at $1.1728 as European markets opened.
Substantial weakness was also visible among internet stocks, as reflected by the 2.8 percent slump by the Dow Jones Internet Index. The NYSE Arca Biotechnology Index plunged by 3.4 percent to its lowest closing level in well over a month.
GOT A PULSE: Health care stocks, which have been in a slump, were headed higher.
Traditional safe-haven currencies including the Swiss franc and Japanese yen rose against the USA dollar, while those from emerging markets slid.
In Asia, South Korea's benchmark Kospi index fell 1.1%, and the Nikkei in Tokyo sank 1.3%.
LONDON, Aug 10 (Reuters) - World stocks fell for a third day on Thursday and investors moved back into the Swiss franc, yen and gold as North Korea ratcheted up tensions with the United States with a threat to land a missile just short of the usa territory of Guam.
United States stocks closed lower on Tuesday after a late afternoon selling spree as investors fled for safety after Trump's vow to respond aggressively to any North Korean threats.More news: Fired author of controversial Google memo breaks his silence
But while investors appeared to favor safe-haven assets, some bargain seekers helped Wall Street's three major indexes pare losses. But the moves were modest.
While gold, a safe-haven favorite, pared some gains, it was last up 1.2 percent, at around its highest since mid-June. The yield on the 10-year Treasury note fell to 2.22 percent from 2.26 percent late Tuesday.
While the tough talk about the potential for war is scary, investors have heard it many times before.
Analysts said media and entertainment stocks also seemed to get caught up in the broader market drop, but emphasized it was often hard to isolate reasons behind specific stocks' movements.
BAD TRIPS: Priceline Group slid 8.2 percent after the online travel booking service issued a profit forecast that was weaker than analysts were expecting. Netflix lost 1.5 per cent. Altice USA, the subsidiary of the French company, added 0.1 per cent. Nvidia fell $6.08, or 3.5 percent, to $166.03.
The dollar carried over its weakness from overnight trading overseas, where dollar selling gathered steam following a news report citing US intelligence officials as saying that North Korea has succeeded in making a nuclear warhead that is small enough to be mounted on its missiles.
The energy sector (+0.4%) trades at the top of the leaderboard, thanks in part to gains in crude oil, with WTI +0.5% at $49.40/bbl ahead of the weekly EIA crude inventory report coming out at 10:30 a.m.