NEW YORK (REUTERS) - The Nasdaq fell more than 1 per cent on Wednesday (Sept 5), dented by technology stocks after Facebook and Twitter executives defended their companies before sceptical US lawmakers.
Adding to pressure on technology stocks, the Justice Department later said it would meet with state attorneys general to discuss worries that social media platforms were"intentionally stifling the free exchange of ideas."
Facebook and Twitter were not specifically named.
Twitter shares dropped 6.1 per cent. Facebook shares fell 2.3 per cent, contributing heavily to both the Nasdaq's and the S&P 500's declines.
The Dow, however, eked out a slight gain.
Shares of other tech companies, including Alphabet, Snap and Microsoft, also fell.
In the consumer discretionary sector, investors also sold off shares of Amazon.com and Netflix, two members of the group of stocks known as FANG.
Tech and consumer discretionary stocks were the biggest weights on the S&P 500. The S&P 500 technology index fell 1.5 per cent, and the S&P 500 consumer discretionary index fell 1.1 per cent.
"Because these companies have become so prominent, they're attracting scrutiny on the part of regulators and legislators,"said John Carey, managing director at Amundi Pioneer Asset Management in Boston. "They remain market leaders, but there are potential risks."
The Dow Jones Industrial Average rose 22.51 points, or 0.09 per cent, to 25,974.99, the S&P 500 lost 8.12 points, or 0.28 per cent, to 2,888.6 and the Nasdaq Composite dropped 96.07 points, or 1.19 per cent, to 7,995.17.
Energy stocks added to the S&P 500's losses.
Halliburton fell nearly 6 per cent after the oilfield services provider warned third-quarter earnings could be hurt from moderating activity in the Permian Basin and a slower-than-expected ramp-up of new Middle East contracts.
Rival Schlumberger dropped 1.5 per cent and Baker Hughes, the oilfield services arm of General Electric , fell 2.2 per cent.
With concerns over trade simmering, Commerce Department data showed that the US trade deficit hit a five-month high in July, which economists said could heighten the White House's resolve to aggressively pursue an "America First" approach to trade.
The data comes amid concerns that a US proposal to impose tariffs on US$200 billion (S$270 billion) more in Chinese imports could go into effect soon after a public comment period ends on Thursday, even as the US-Canada talks to renegotiate the North American Free Trade Agreement continue.
China's JD.com slid 10.6 per cent, down for the second day in a row, after police said the retailer's Chief Executive Officer Richard Liu was arrested in Minneapolis last week after a rape allegation. Liu has denied any wrongdoing and was released on Saturday.
Declining issues outnumbered advancing ones on the NYSE by a 1.30-to-1 ratio; on Nasdaq, a 1.63-to-1 ratio favored decliners.
The S&P 500 posted 45 new 52-week highs and nine new lows; the Nasdaq Composite recorded 97 new highs and 51 new lows.
Volume on US exchanges was 7.03 billion shares, compared to the 6.15 billion average over the last 20 trading days.