UPDATE 10-Brent slips to near $106, economic woes trump lower OPEC output

* Eyes on U.S., euro zone central bank for stimulus moves

* OPEC output falls 450,000 bpd in July - Reuters survey

* U.S. crude stocks seen down last week on lower imports

* Coming up: Fed policy meeting on Tuesday, Wednesday

(Updates with Brent settlement, U.S. inventory poll, adds

details)

NEW YORK, July 30 (Reuters) - Brent oil ended down for the

first time in five sessions on Monday as worries that expected

stimulus from the United States and Europe may fail to lift

their economies overshadowed signs of lower OPEC production.

Supply from the 12-member Organization of the Petroleum

Exporting Countries (OPEC) fell by 450,000 barrels per day (bpd)

in July to 31.18 million bpd, a Reuters survey showed, as

Western sanctions further cut supply from Iran and due to

reduced shipments from Angola, Saudi Arabia and Libya.

"The fundamentals are looking more constructive for the

second half of this year, with the supply-and-demand balance now

close to a deficit compared to the large surplus in the first

half," said Katherine Spector, a commodity strategist at the

Canadian Imperial Bank of Commerce in New York.

"The bearish factor is liquidity. Trading has been

relatively slow and hedge funds and other investors don't appear

to want to commit in the current economic environment."

Slowing growth in the United States, the world's top oil

consumer, has triggered expectations of stimulus measures from

the Federal Reserve, which meets on Tuesday and Wednesday.

European Central Bank President Mario Draghi also promised

last week to do what it takes to protect the euro, raising

expectations of new policy measures to solve the debt crisis

when the ECB meets on Thursday.

But analysts say markets may be hoping for too much.

"Speculation over central bank action looks like it has gone

too far," said Carsten Fritsch, an oil analyst at Commerzbank in

Frankfurt.

"The euro has already begun to retreat and oil has also

started to weaken. The move upwards seems exaggerated."

In London, Brent crude for September delivery

settled at $106.20 a barrel, edging down 27 cents.

U.S. September crude settled at $89.78 a barrel,

falling 35 cents, also ending a four-day winning streak.

Brent has risen more than 8 percent in July while U.S. crude

has gained around 6 percent, supported largely by hopes of more

economic stimulus.

Brent's premium against U.S. crude rose slightly to $16.42,

after closing at $16.34 on Friday.

Trading volumes were light, with Brent dealings down 55

percent from the 30-day average and U.S. crude down 34 percent

from its 30-day average, according to Reuters data.

Thursday's ECB meeting is in sharp focus, given the threat

the long-running euro zone crisis poses to the global economy.

U.S. Treasury Secretary Timothy Geithner and Germany's

Finance Minister Wolfgang Schaeuble issued a joint statement

after their meeting on Monday that emphasized "the need for

policymakers to adopt and implement all reform steps required to

deal with the financial crisis and crisis of confidence."

Optimism about ECB action caused European shares to rally

though U.S. equities edged lower following their best two-day

run this year as investors awaited the central bank meetings.

The euro fell against the dollar for the first time in four

days as investors turned cautious.

OPEC OUTPUT FALLS, U.S. DATA AWAITED

OPEC's production has declined since it pumped 31.75 million

bpd in April, the highest since September 2008, based on Reuters

surveys. The biggest drop in supplies in July came from Iran,

whose crude is subject to a European Union embargo that started

on July 1 barring EU insurance firms from covering Iran's

exports.

Iran's output fell by 150,000 bpd to 2.8 million bpd, the

lowest level in more than two decades, according to the U.S.

Energy Information Administration.

Saudi Arabia trimmed supply slightly in July because of

lower demand from some customers, such as in the United States,

sources in the survey said. It still kept output at 10 million

bpd, near the highest level in decades.

Oil prices have found support from escalating tensions in

the Middle East, with rising violence in Syria threatening to

destabilise the region further.

Iran is still in a face-off with the West over its nuclear

programme, fuelling uncertainty about supply in the oil markets.

The West insists Tehran is trying to develop a nuclear bomb, but

the Islamic republic has vehemently denied this assertion.

On Tuesday, the industry group American Petroleum Institute

will release its report on how U.S. petroleum inventories

shifted for the week to July 27. That will be followed by U.S.

government data for the same period on Wednesday.

A Reuters poll of analysts ahead of the reports forecast

that U.S. crude stockpiles fell by 1.6 million barrels last week

due to lower imports.

(Additional reporting by Gene Ramos in New York; Christopher

Johnson in London and Luke Pachymuthu in Singapore; Editing by

Marguerita Choy, David Gregorio and Dale Hudson)