* Stocks weaker on central banks, China worries
* Wall Street set for losses
* Greek debt in focus at Brussels meeting
* Euro slips, dollar firmer
By Jeremy Gaunt, European Investment Correspondent
LONDON, March 15 (Reuters) - Concerns about monetary tightening in China and caution ahead of U.S. and Japanese central bank policy meetings this week weighed on financial markets on Monday, weakening stocks.
The euro, meanwhile, slipped on concerns that a potential financial aid package for Greece, being discussed by finance ministers in Brussels, would not be enough to solve the euro zone's sovereign debt crisis.
MSCI's all-country world index <.MIWD00000PUS> was off 0.3 percent, with the pan-European FTSEurofirst 300 <
> down tha same and Japan's Nikkei closing up just 0.01 percent < >. Wall Street looked set to open lower."We have had quite a lot of macro uncertainties out there," said Jeremy Batstone-Carr, head of private client research at Charles Stanley in London.
"The equity markets have had a high degree of complacency regarding these concerns."
The U.S. Federal Reserve and Bank of Japan both meet in the coming week and will be keenly watched for their views on how attempts to ignite economic growth have fared.
Wednesday's Fed meeting is expected to hold interest rates near zero and reiterate the need for an "extended period" of "exceptionally low" rates. [
]The Bank of Japan, meanwhile, is under pressure to loosen policy at its meeting on Tuesday and Wednesday, most likely in the form of increasing funds offered under its lending operation. [
]China, in the meantime, is causing some investors concern because of both its rising inflation and its insistence that the yuan currency is not undervalued, a bone of contention with the United States.
On again, off again reports of European Union help for debt-burdened Greece were also putting some investors on edge.
Finance ministers from the 16 countries using the euro, the Eurogroup, were meeting in Brussels on Monday to discuss the Greek debt crisis and the country's progress in introducing austerity measures necessary to regain the confidence of markets [
] The ministers will look at how to give Greece financial aid should it ask for help, but there were signs France and Germany were holding out on making concrete commitments.
EURO SLIPS ON GREECE
The euro slipped with some analysts saying that anyone hoping for a quick resolution to the Greek debt issue would be disappointed.
"I don't see anything solid coming out of Brussels and the overall picture is little changed," said Maurice Pomery, managing director at consultants Strategic Alpha.
The euro <EUR=> was trading down 0.4 percent on the day at $1.3704, retreating from a three-week high of $1.3796 hit on Friday.
The dollar <.DXY> traded up around 0.4 percent against a basket of currencies.
Euro zone government bond prices were higher. (Additional reporting by Joanne Frearson, Ian Chua and Neal Armstrong, editing by Mike Peacock) (On Twitter: For economic tweets, follow www.twitter.com/macroscope. For investment tweets, follow www.twitter.com/reutersJeremyG)