(Corrects date consultations end to Sept. 6 from Sept. 5, in paragraph 7.)
* Facebook drops after brokerage downgrade
* Nike falls after boycott gains traction on social media
* Deadline for U.S.-China tariff consultations on Sept. 5
* Amazon joins $1 trillion club
* Indexes down: Dow 0.28 pct, S&P 0.33 pct, Nasdaq 0.43 pct
By Shreyashi Sanyal
Sept 4 (Reuters) - U.S. stocks fell on Tuesday, with Facebook leading a decline in the technology sector and Nike dragging on the Dow Jones Industrial index, setting a rough start for September as investors grappled with trade issues.
Facebook shares fell 2.8 percent, on track for their worst day since July 26, after brokerage MoffettNathanson downgraded the social media giant, warning of revenue growth deceleration.
Other internet stocks Alphabet, Twitter, Snap fell between 1.4 percent and 3.8 percent, while the S&P technology index dropped 0.50 percent.
Nike fell 2.7 percent as the company faced a backlash after it chose Colin Kaepernick, the first NFL player to kneel during the national anthem as a protest against racism, to participate in a new ad campaign.
The dip in the main indexes came after a strong August, with the Nasdaq posting its largest monthly gain since January.
"Since August was a good month for stocks, we are seeing some profit-taking and the headlines on China negotiations seem to be weighing a little bit as well," said Sean O'Hara, president of Pacer ETFs in Paoli, Pennsylvania.
Consultations on a U.S. proposal for new tariffs on Chinese goods is set to end on Sept. 6, after which U.S. President Donald Trump can follow through on plans to impose levies on $200 billion more of Chinese imports, though it is unclear how quickly that will happen.
Talks between Canada and the United States to renegotiate the North American Free Trade Agreement (NAFTA) ended on a sour note on Friday, but officials set plans to resume their talks on Wednesday.
Amidst the gloom, Amazon's shares rose as much as 1.9 percent to hit a record $2,050.50, joining Apple in the $1 trillion market cap.
"Amazon is just light years ahead of others and has such an overwhelming advance over any other entities," said Kevin Miller, chief investment officer at Evaluator Funds in Bloomington, Minnesota.
At 13:13 ET the Dow Jones Industrial Average was down 72.11 points, or 0.28 percent, at 25,892.71, the S&P 500 was down 9.55 points, or 0.33 percent, at 2,891.97 and the Nasdaq Composite was down 35.00 points, or 0.43 percent, at 8,074.54.
The indexes pared losses after data from the Institute for Supply Management showed U.S. manufacturing activity accelerated to more than a 14-year high in August, boosted by a surge in new orders.
Eight of the 11 major S&P 500 sectors were lower, led by a 1.52 percent drop in the telecom sector.
Verizon slipped 2.5 percent after Barclays downgraded the wireless carrier's stock.
Western Digital fell 6.7 percent and Seagate Technology dropped 9.2 percent after Evercore ISI downgraded shares of the hard-disk drive makers.
JD.com slid 6 percent after the Chinese retailer's chief executive officer was arrested in the United States on suspicion of criminal sexual conduct and later released.
Declining issues outnumbered advancers for a 2.10-to-1 ratio on the NYSE and a 1.87-to-1 ratio on the Nasdaq.
The S&P index recorded 47 new 52-week highs and seven new lows, while the Nasdaq recorded 121 new highs and 42 new lows. (Reporting by Shreyashi Sanyal in Bengaluru; Editing by Shounak Dasgupta)