* Market eyes Greece's vote on tax hikes, spending cuts
* Gulf oil output unlikely to fall on IEA move
* Coming Up: U.S. personal income at 1230GMT
By Florence Tan
SINGAPORE, June 27 (Reuters) - Brent slipped under $105 on Monday, extending the previous week's losses, as the U.S. dollar gained ahead of a vote by Greece to clear unpopular fiscal austerity measures.
The market is positioning itself ahead of economic data from the United States that is expected to show slowing growth. Prices are also under pressure on expectations Gulf exporters would keep crude supplies steady despite a surprise release of emergency stocks.
ICE Brent crude for August fell 73 cents
to $104.39 a barrel by 0236 GMT, after the contract posted two
straight weeks of losses. U.S. crude
"The market is trying to pre-empt Greece and worries in the West," Jonathan Barratt, managing director of Commodity Broking Services in Sydney.
Athens will vote on Wednesday the framework austerity package on tax increases and spending cuts, and then on its implementation on Thursday. It is critical for the country to pass the package to secure funding from international lenders to avert a sovereign default.
The U.S. dollar index, which measures the greenback's value against a basket of major currencies, was trading above a downward trendline that began a year ago. It was up 0.23 percent by 0236 GMT to 75.843 , having risen 4 percent since May.
Brent crude prices fell 2 percent on Friday, dropping 7
percent for the week. The contract's premium to U.S. crude
OPEC SUPPLY
The IEA's decision to release 2 million barrels per day over 30 days is more than the daily loss of Libya's 1.2 million bpd exports, and may help ease concerns that the Organization of the Petroleum Exporting Countries (OPEC) will struggle to meet demand as consumption from emerging nations surges.
"It also releases pressure on OPEC," Barratt said. "It's more of a genuine consensus to lower import prices to avoid economic slowdown."
Gulf oil exporters are unlikely to cut production in response to the International Energy Agency (IEA) releasing emergency stocks because demand for their crude is strong, two Gulf OPEC delegates said on Sunday. The group failed to agree on raising output on June 8.
Still, the impact of additional supply on oil markets is likely to be limited unless Libyan leader Muammar Gaddafi steps down, allowing the country to resume production, he said.
"The only way for oil to get lower is Gaddafi," Barratt said. "The market will trade into support and is expected to pick up, but the context is weak." (Reporting by Florence Tan; Editing by Manash Goswami)