* Czechs set size of 5-1/2 year eurobond at 1.5 bln
* Final guidance at 190 bps over swaps
* Sale reduces govt borrowing pressure, helps local bonds
(Adds details, quotes, prices)
By Jason Hovet
PRAGUE, April 28 (Reuters) - The Czech Republic returned to international debt markets for the first time in almost a year with the sale of a 5-1/2 year eurobond on Tuesday, seeking to build up a cushion for this year's ballooning budget gap.
The size of the euro-denominated bond, maturing in November 2014, was set at 1.5 billion euros, with final guidance at mid-swaps plus 190 basis points, Thomson Reuters online news and market analysis service IFR said.
Czech bond dealers said the book size was at more than 2 billion euros ($2.60 billion) by midday. Barclays, Deutsche Bank <DBKGn.DE> and Erste Bank <ERST.VI> are managing the sale.
Sentiment for central European debt has improved since March due to rebounding global stocks and International Monetary Fund pledges to make emerging market funds available. The Czechs have sold more domestic bonds than planned in that time.
The Czechs last sold on international markets last June with a bigger-than-planned 2 billion euro, 10-year eurobond issue priced at 25 basis points over swaps.
The outstanding Czech eurobond due in June 2014 <CZ019495752=> was quoted with a yield of 4.440/004 on Tuesday, 170 basis points over swaps. The domestic 5-year quoted at 4.515/4.104 percent yield, 136.8 basis points above swap.
The yield on the domestic 5-year paper has dropped 30 basis points in the last month on improved sentiment, and dealers expect the euro issue to ease pressure on local markets.
"The bigger size of the eurobond will mean less need to issue on domestic markets," a dealer said. "So this will be quite positive for local bonds."
BREATHING ROOM
Komercni Banka fixed income analyst Anne-Francoise Bluher said the state has borrowed 98 billion crowns on domestic markets so far this year.
She said this amount and an expected 1.5 billion eurobond sale would mean the country has already covered more than half of its forecast borrowing needs for this year.
"Now they are in good position, but that's not forever," she said. She said an unclear outlook for the 2010 budget and an early election planned for the autumn would pressure local bonds.
Komercni Banka expects the government's gross borrowing needs to jump to 198 billion to 248 billion crowns from the government's plan of up to 132.6 billion, set when the country aimed for a budget gap at 1.5 percent of gross domestic product.
But the budget deficit is now expected to triple to up to 5 percent of GDP. The ministry's new forecast shows the economy contracting 2.3 percent as western demand for central Europe's cars, televisions and other goods plummets.
In Slovakia, the first from the region to swap its currency for euros in January, the government mandated banks on Monday to lead a eurobond issue worth at least 1 billion euros.
The Czech and Slovak issues would follow a Slovenian eurobond sale in March that priced a 2014 bond at 160 basis points over swaps.
The Czech ministry had scrapped plans for an eurobond issue in February when the price of insuring credit risk shot to record highs on central European banking and financing worries.
Since then prices on a 5-year credit default swap (CDS) have dropped to 150 basis points from a high of 350 basis points seen on Feb. 24, according to Reuters data. (Additional reporting by Jane Baird in London; Editing by Ruth Pitchford)