Wall Street stocks have ended lower on renewed anxiety over falling oil prices and the rising US dollar.
The Dow Jones Industrial Average fell 145.91 points (0.82 per cent) to 17,749.31.
The broad-based S&P 500 dropped 12.55 (0.61 per cent) to 2,053.40, while the tech-rich Nasdaq Composite Index declined 21.53 (0.44 per cent) to 4,871.76.
US oil prices finished the week below $US45 a barrel after the International Energy Agency warned that rising US crude inventories were approaching the limits of storage capacity amid the global oversupply.
The euro got as low as $US1.0466, its lowest level since January 2003.
Investors fear the strong US dollar will harm US exports and emerging market economies, analysts said.
“Basically, you see a reversal of the gains we made yesterday, and you see a market that has entered a period of uncertainty as we head into the Federal Reserve meeting next week,” said David Levy, portfolio manager at Kenjol Capital Management.
Dow companies with the biggest declines included IBM (-2.3 per cent), General Electric (-1.4 per cent) and United Technologies (-2.1 per cent).
Oil-services companies took a hit from declining oil prices. Halliburton fell 2.0 per cent, Weatherford International shed 3.6 per cent and Schlumberger lost 0.6 per cent.
Several technology stocks dropped, including Facebook (-1.1 per cent), Netflix (-2.2 per cent) and Priceline (-2.4 per cent). Heavyweight Apple shed 0.7 per cent.
Ulta Salon, Cosmetics & Fragrance, a cosmetics retailer, rose 3.7 per cent as fourth-quarter net income jumped 23.5 per cent to $US87.3 million ($A113.4 million) behind an 11.1 per cent rise in comparable sales.
Herbalife, a marketer of nutrition supplements, advanced 8.2 per cent following reports that US investigators are questioning associates of activist Herbalife critic Bill Ackman in a probe of potential manipulation of the stock.
Bond prices were mixed. The yield on the 10-year US Treasury rose to 2.12 per cent from 2.11 per cent on Thursday, while the 30-year remained unchanged at 2.70 per cent. Bond prices and yields move inversely.
