* World stocks under pressure, markets off recent highs
* Euro falls against dollar by reported Greek comments
* U.S. equities add gains after solid Philly Fed
(Updates with open of U.S. markets; adds byline, dateline)
By Jennifer Ablan and Jeremy Gaunt
NEW YORK/LONDON, March 18 (Reuters) - World stocks slipped back on Thursday and the euro weakened against the U.S. dollar on worries that Greece was not optimistic about receiving European Union aid for its fiscal problems.
The euro <EUR=> was down around 0.40 percent at $1.3682 by mid-morning New York trade, recovering slightly from a session low of $1.3648. The MSCI's all-country world stock index <.MIWD00000PUS> dipped 0.20 percent as did its emerging market-only counterpart <.MSCIEF>.
An unidentified Greek official was quoted in a report as saying Greece was increasingly pessimistic about the prospect for assistance at a March 25 European Union summit and may seek International Monetary Fund aid during the April 2-4 Easter weekend. [
]Greece's finance minister later described the report as "ridiculous" and said all options for getting support to escape a debt crisis were still open.
"This just highlights the uncertainty surrounding the Greece issue. There seems to be no consensus in the euro zone, which is undermining confidence and that is what is weighing on the euro today," said Antje Praefcke, currency strategist at Commerzbank.
Greek Prime Minister George Papandreou told the European Parliament on Thursday his country would not be able to sustain its planned deficit cuts if it had to continue borrowing at high rates. He also said Greece was not asking for help, but wanted political support and Europe needed to take action.
Papandreou added that Greece would not default.
For their part, some US stock indexes rose, after a flat open, following a report that showed manufacturing in the Philadelphia region expanded in March for a seventh month. [
]At 10:30 a.m. EST, the Dow Jones industrial average <
> was up 20.48 points, or 0.19 percent, at 10,754.15, while the benchmark Standard & Poor's 500 Index <.SPX> was down 0.21 points, or 0.02 percent, at 1,166.00. The Nasdaq Composite Index < > was up 0.29 points, or 0.01 percent, at 2,389.38.U.S. equities also were boosted by reports before the open. U.S. consumer prices were unexpectedly unchanged in February as a drop in energy costs was offset by higher food and medical care costs, while the number of U.S. workers filing new applications for unemployment insurance fell slightly less than expected last week.[
] [ ]U.S. Treasury debt prices were also mixed.
The benchmark 10-year U.S. Treasury note <US10YT=RR> was down 3/32, with the yield at 3.65 percent, while the 2-year U.S. Treasury note <US2YT=RR> was down 1/32, with the yield at 0.9358 percent. At the longer end of the yield curve, the 30-year U.S. Treasury bond <US30YT=RR> was unchanged with the yield at 4.57 percent.
In currencies, the dollar was up against a basket of major trading-partner currencies, with the U.S. Dollar Index <.DXY> up 0.39 percent at 79.948 from a previous session close of 79.638.
In energy and commodities prices, U.S. light sweet crude oil <CLc1> fell 43 cents, or 0.52 percent, to $82.50 per barrel. Spot gold prices <XAU=> rose 55 cents, or 0.05 percent, to $1124.60, while the Reuters/Jefferies CRB Index <.CRB> was down 0.19 points, or 0.07 percent, at 276.11. (Additional reporting by Ellis Mnyandu in New York and Brian Gorman and Jeremy Gaunt in London; Editing by Chizu Nomiyama)