* Wall Street slips on unexpected job losses
* Euro extends gains against dollar on quarter-end buying
* U.S. Treasuries gain on jobs report, quarter-end buying
* Pan-European stock index marks 4th straight qtr of gains (Updates with mid-day U.S. markets, quarter-end comments)
By Jennifer Ablan
NEW YORK, March 31 (Reuters) - U.S. stocks dropped on Wednesday after a private report showed an unexpected drop in private-sector jobs, while the euro extended gains against the dollar on quarter-end buying.
Prices of U.S. Treasuries rose as the ADP report on private sector employment dented hopes of improvements in the economy and as buying by fund managers to meet quarter-end needs fueled bids.
U.S. companies cut an estimated 23,000 jobs this month, ADP Employer Services reported. Economists had expected an increase of 40,000 jobs, and the report sparked renewed worries about the outlook for the labor market ahead of Friday's release of the U.S. government's closely watched monthly payrolls report.
"The ADP report triggered some nervousness," said Tom Sowanick, chief investment officer of the Omnivest Group in Princeton, New Jersey. "Markets are also down because it is the end of the quarter and some investors are locking in gains on this last day."
Despite the weakness in U.S. stocks, the benchmark S&P 500 was on track for a fourth straight quarter of gains.
In Europe, the FTSEurofirst 300 index of top European shares marked its fourth straight quarter of gains on Wednesday, although the pan-European index fell on the day.
On Wall Street, sentiment was also pressured by weaker regional manufacturing data. The Chicago Purchasing Manager's Index showed business activity in the U.S. Midwest slipped to a reading of 58.8 in March, below economists' expectations.
The Dow Jones industrial average <
> was down 22.67 points, or 0.21 percent, at 10,884.75, while the Standard & Poor's 500 Index <.SPX> was down 0.51 points, or 0.04 percent, at 1,172.76. The Nasdaq Composite Index < > was up 0.81 points, or 0.03 percent, at 2,411.50.For the quarter, the Dow is up over 4.30 percent, while the S&P has gained 5 percent and the Nasdaq up 6.20 percent.
In March, U.S. fund managers slightly decreased their high exposure to equities and raised their bond allocations on signs the economic recovery continues to be slow-moving, a Reuters poll showed on Wednesday. For more details please click on [
]In London, the FTSEurofirst 300 index <
> closed down 0.07 percent at 1,078.58 points. Financial stocks were among the top losers. The STOXX Europe 600 banking index <.SX7P> fell 0.5 percent a day after climbing to its highest level in more than two months.Moody's Investors Service on Wednesday downgraded its rating on five Greek banks, citing weakened financial strength and pressures from the country's fiscal challenges. For details click on [
].The MSCI world equity index <.MIWD00000PUS> was essentially flat at 0.12 percent at 307.86, while the emerging stocks <.MSCIEF> were up at 0.12 percent.
U.S. Treasuries rose as the ADP jobs data reduced bets on the strength of the economy.
"This throws a bit of cold water on a barn-burner number on Friday," said Ken Mayland, President of Clearview Economics LLC in Pepper Pike, Ohio.
Analysts polled by Reuters forecast a 190,000 job gain in March, which would be the second monthly increase since the recession began in December 2007. [
]On the day, the benchmark 10-year U.S. Treasury note <US10YT=RR> was up 7/32, with the yield at 3.8315 percent, while the two-year U.S. Treasury note <US2YT=RR> was up 2/32, with the yield at 1.0277 percent. The 30-year U.S. Treasury bond <US30YT=RR> was up 12/32, with the yield at 4.7228 percent.
EURO UP ON QUARTER-END BUYING
In currency markeets, the dollar hit a three-month high against the yen and remained on track for its best quarterly performance in a year on the view that the U.S. economy continues to improve, despite Wednesday's jobs data.
Against the Japanese yen, the dollar <JPY=> was up 1.01 percent at 93.37 yen from a previous session close of 92.440.
Analysts expect the U.S. government's report on March payrolls to show an increase in jobs, albeit aided by temporary government hiring for the 2010 U.S. census.
The euro <EUR=> was up 0.87 percent at $1.3526 from a previous session close of $1.3410. The euro extended gains against the dollar to session peaks above $1.35, boosted largely by quarter-end buying.
That said, traders warned euro zone fiscal worries are likely to limit further gains.
"We could see a move higher from here, with a possible move up to recent highs around $1.3540-50, but whether that can be sustained is questionable as news out of Europe is still pretty bad," said Brian Dolan, chief currency strategist at Forex.com in Bedminster, New Jersey.
The dollar was down against a basket of major trading-partner currencies, with the U.S. Dollar Index <.DXY> down 0.60 percent at 80.985 from a previous session close of 81.470.
In energy and commodities prices, U.S. light sweet crude oil <CLc1> rose 85 cents, or 1.03 percent, to $83.22 per barrel, while spot gold prices <XAU=> rose $11.75, or 1.07 percent, to $1114.30. The Reuters/Jefferies CRB Index <.CRB> was down 0.40 points, or 0.15 percent, at 273.32. (Additional reporting by Steven C. Johnson in New York; Editing by Leslie Adler)