"We saw a tentative recovery in risk appetite yesterday from the sell off inspired by North Korea but I think justifiably that move is fading a little bit today", said Saxo Bank's head of FX strategy John Hardy.
Crude oil prices fell on Thursday, on concerns of lingering global oversupply as Russian Federation considered a future output resumption and OPEC boosted its July production numbers.
The Toronto Stock Exchange's S&P/TSX composite index fell 143.08 points to 15,074.25, with almost all of its sectors moving lower. The Dow shed 0.2 percent.
Biotechnology stocks are turning in some of the market's worst performances in morning trading, resulting in a 1.6 percent drop by the NYSE Arca Biotechnology Index.
North Korea also laid out detailed plans of how it would launch a missile strike on us military bases in Guam (http://www.marketwatch.com/story/north-korea-details-plan-to-fire-missiles-toward-guam-says-only-absolute-force-will-work-with-trump-2017-08-09).
The statement said the KPA would complete mid-August a plan for the attack, which would involve four rockets flying over Japan, and submit it to Kim Jong-Un for consideration as a "crucial warning to the US". U.S. Secretary of State Rex Tillerson said he did not believe there was an imminent threat.
TECH SLIDE: Losses among technology stocks led the market slide.
Economic docket: New York Federal Reserve President William Dudley said reaching the Fed's 2% inflation target this year is going to be tough (http://www.marketwatch.com/story/feds-dudley-says-2-inflation-target-will-remain-illusive-even-if-price-pressures-pick-up-2017-08-10) even if monthly data begins picking up. Advanced Micro Devices gave up 50 cents, or 3.9 percent, to $12.33.
FINANCIALS FALLING: Several financial sector companies also helped pull down the market.
The pan-European FTSEurofirst 300 index .FTEU3 lost 1.11 percent.More news: 36 dead, 13 injured in NW China road accident
The biggest fallers were G4S down 24.7p to 305.9p, Standard Chartered down 20.9p to 783.1p, Prudential down 44p to 1,841.5p, Shire down 92p to 3,945p.
UNDERCOOKED: Blue Apron slumped 17.1 percent after the meal kit seller reported a sequential decline in customers in the second quarter due to a planned reduction in marketing. The stock fell 76 cents to $5.48.
Gold hit its highest in nearly two months after Trump added to the geopolitical anxiety by boasting of the strength of the USA nuclear arsenal. The yield on the 10-year Treasury note fell to 2.23 percent from 2.26 percent late Tuesday.
Also rising was oil and gas services company Amec Foster Wheeler as pre-tax swung to a profit of £77m from a loss of £446m a year earlier, though.
The CBOE Volatility Index, the most widely followed barometer of expected near-term US stock market volatility, rose the most in about 12 weeks. It added 39 cents to $49.56 a barrel on Wednesday.
Spot gold added 1.3 per cent to US$1,277.15 an ounce.
The Dow is down 44.11 points, or 0.2 percent. The figure showed a decline of 1.1% versus expectations for a 0.5% drop and reversing from a 1.9% gain in May.
In Europe, the Stoxx 600 Index fell 1%.
Stocks in Taiwan, Singapore and other Southeast Asian countries were also lower.
The biggest risers on the FTSE 100 Index were Fresnillo up 72p to 1,544p, Randgold Resources up 200p to 7,380p, WorldPay Group up 4.9p to 388.5p, BAE Systems up 7p to 582.5p.