* US stocks drop as services sector fall sparks worries
* Euro rises as ECB comments suggest gradual withdrawal of support
* US Treasuries fall ahead of new supply (Recasts, updates with closing prices)
By Al Yoon
NEW YORK, Dec 3 (Reuters) - U.S. stocks fell on Thursday after an unexpected contraction in the vast U.S. services sector spurred worries about the economic recovery, while the euro rose against the dollar after comments suggesting the European Central Bank would gradually withdraw support measures.
The decline in activity in the U.S. services sector reported by the Institute for Supply Management also dragged down European stocks. But there was little reaction to the data in the U.S. government bond market, with Treasury prices falling ahead of looming bond auctions next week.
Activity in the U.S. services sector fell to its lowest level in July, according to an index by the Institute of Supply Management.
The U.S. services sector data "doesn't seem to get as much weight as the manufacturing (data), but seeing it head in this direction is not a positive sign," said Dan Cook, senior market analyst at IG Markets in Chicago.
The Dow Jones Industrial Average <
> fell 86.53 points, or 0.83 percent, to 10,366.15. The Standard & Poor's 500 Index <.SPX> edged down 0.84 percent to 1,099.92 and The Nasdaq Composite Index < > climbed 0.54 percent to 2,173.14.U.S. stocks fell on the news, and nervousness rose a day before the federal government's key monthly payrolls report.
Wall Street sold off more sharply shortly before the close as a massive equity offering by Bank of America spurred concerns that other banks could sell new shares and dilute the equity of existing shareholders.
World equities dropped from a 14-month intraday high on Thursday, reflecting the skittishness of investors who at year end want to protect profits earned since March.
Stocks had been rising since Bank of America Corp. on Wednesday said it was able to repay $45 billion of taxpayer bailout funds, which suggested strength in the financial sector.
Shares of Bank of America <BAC.N, the largest U.S. bank by assets, rose 0.7 percent to $15.76.
European shares fell on Thursday on the U.S. services data as as miners tracked a retreat in gold prices from record highs.
The pan-European FTSEurofirst 300 index <
> fell 0.15 percent to 1,014.20 points.Markets were unmoved by a Markit survey showing that the euro zone's service sector expanded for the third consecutive month in November; the expansion was at a slower pace than reported early last week.
The euro rose against the U.S. dollar on Thursday after the European Central Bank hinted it would slowly start withdrawing emergency spending, while the yen fell amid fears Japan may move to weaken its currency.
Though the ECB left interest rates at record lows, its president, Jean-Claude Trichet, said the next 12-month refinancing operation for banks would be the last. The bank also lifted its growth forecast for 2010. [
]That sent the euro near a 16-month high around $1.5140 and pushed it to its highest level against the yen in a week. It pared gains after Trichet said interest rates remain appropriate and did not offer a timetable for winding down the ECB's ultra-loose monetary policy.
Such policies tend to undermine a currency's value because they increase money supply and risk higher inflation.
At the close in New York, the euro <EUR=> rose 0.17 percent to $1.5070. Against the Japanese yen, the dollar <JPY=> climbed 0.86 percent to 88.20 yen.
The MSCI world equity index <.MIWD00000PUS> rose as high as 302.83, its highest level since late September 2008. After the U.S. trading session, it declined by 0.23 percent, to 299.64.
Despite softer U.S. stocks, world equities have erased all the losses suffered after Dubai announced a standstill last week on billions of dollars of debt held by its conglomerate Dubai World, with investors taking risk-friendly outlooks that the world's central banks would keep interest rates low.
"This is certainly one of the reasons for the positive market sentiment today," said Joerg Rahn, chief investment officer at wealth management company Marcard, Stein & Co in Hamburg.
Japan's Nikkei average soared nearly 4 percent to its highest close in five weeks as exporters such as Canon Inc <7751.T> jumped on the weaker yen. Emerging stocks <.MSCIEF> rose 0.5 percent.
In energy and commodities prices, U.S. light sweet crude oil <CLc1> fell 75 cents, or 0.98 percent, to $75.85 per barrel, and spot gold prices <XAU=> fell $4.00, or 0.33 percent, to $1210.50.
U.S. government bond prices fell, sending yields to one-week highs, ahead of auctions of $74 billion in coupon supply next week. Treasuries also reacted to a decline in initial jobless claims, which suggested the economy recovery was taking hold.
Yields on benchmark 10-year Treasury notes rose 0.07 percentage point to 3.38 percent.
German government bond futures<FGBLc1>, the euro zone benchmark, fell 0.2 percent. (Additional reporting by Christoph Steitz in Frankfurt and Steven C. Johnson and Chuck Mikolajczak in New York; Editing by Leslie Adler) ((albert.yoon@thomsonreuters.com; +1-646-223-6347; Reuters Messaging: albert.yoon.reuters.com@reuters.net))