(Adds U.S. market open, byline, dateline; previous LONDON)
* Trump threatens government shutdown, scrap trade accord
* Euro gains on strong PMI reports
* Oil gains on eighth weekly U.S. crude stock drawdown
By Herbert Lash
NEW YORK, Aug 23 (Reuters) - Stocks on Wall Street fell, the dollar sagged and rates on Treasury debt slipped on Wednesday after U.S. President Donald Trump's threat to shut down the government and nix a trade accord with Canada and Mexico raised investor angst.
European equities shrugged off a PMI survey that showed euro zone manufacturing businesses had their best month of growth in six and a half years in August.
The upbeat survey was the latest sign of economic recovery in the single currency bloc, which could encourage the European Central Bank to start scaling back its stimulus.
Dovish comments by ECB chief Mario Draghi had little market impact though investors kept a close eye on monetary policy a day before the start of a central bank symposium in Jackson Hole, Wyoming.
Trump's comments at a rally in Phoenix on Tuesday came as lawmakers face a deadline in late September to raise the U.S. debt ceiling or risk defaulting on debt payments.
Credit ratings agency Fitch Ratings said a failure to raise the federal debt ceiling in a timely manner would prompt it to review the U.S. sovereign rating "with potentially negative implications."
How much emphasis to put on Trump's remarks is hard to say, said John Canavan, market strategist at Stone & McCarthy Research Associates in New York.
"It's largely dependent on Congress to keep the government open. You can't entirely discount his comments, but based on the history of his off-the-cuff comments, you can't take them as policy stance," Canavan said.
MSCI's gauge of stocks across the globe shed 0.10 percent and the pan-European FTSEurofirst 300 index lost 0.56 percent. Stocks closed higher in Asia.
On Wall Street, the Dow Jones Industrial Average fell 71.98 points, or 0.33 percent, to 21,827.91. The S&P 500 lost 7.9 points, or 0.32 percent, to 2,444.61 and the Nasdaq Composite dropped 21.47 points, or 0.34 percent, to 6,276.01.
Oil prices rose after U.S. crude inventories declined for the eighth straight week and U.S. crude production increased only slightly.
Brent crude futures rose 36 cents to $52.23 a barrel, while U.S. West Texas Intermediate crude futures were trading at $48.08, up 25 cents.
The dollar fell 0.45 percent to 109.11 yen, with the dollar index slipping 0.34 percent to 93.228.
The euro was propped up by strong German and French PMI survey readings, though analysts warned its gains could be short-lived due to concerns about heavy one-sided bets.
The euro rose 0.43 percent to $1.1810 and hit a fresh 10-month peak against the British pound, above 92 pence.
Sterling fell below $1.28 for the first time since late June. Concerns about Britain's economic prospects and the Brexit process encouraged investors to push the pound lower.
Benchmark 10-year Treasury notes were last up 9/32 in price to yield 2.1834 percent.
"To the extent that equities are reacting to last night's speech … you can say that's bleeding now into fixed-income," said Jim Vogel, an interest rate strategist at FTN Financial in Memphis.
Reporting by Herbert Lash, additional reporting by Sam Forgione and Richard Leong in New York; Editing by Nick Zieminski