Spain borrowing costs up as Irish return to market By Paul Day and Padraic Halpin MADRID/DUBLIN (Reuters) - Spain's 10-year borrowing costs rose on Thursday despite the euro zone's latest plan to help its troubled economies, while Ireland returned to markets for the first time since its bailout and paid less for short-term funds than Madrid. International appetite for debt auctions held by the two countries - both victims of banking crises caused by a property market crash - varied widely, although Dublin's first commercial borrowing in almost two years was much more modest in size than Madrid's. Whereas Ireland trumpeted international demand at its sale of three-month treasury bills, most foreign investors are shunning Spain's debt auctions, even though Madrid has avoided going to international lenders for a full sovereign bailout. The Spanish Treasury paid the highest rate in over seven months to borrow 10-year funds, suggesting the positive effect of last weekend's agreement by euro zone leaders is wearing off. Altogether, Madrid auctioned 3 billion euros ($3.75 billion) in three maturities of bonds. It sold 747 million euros in the benchmark 10-year bonds at an average yield of 6.43 percent, up from 6.044 percent at the last such auction on June 7. Peter Chatwell, a rate strategist at Credit Agricole, said that at least Spain was still able to raise funds in the market - despite the problems of its banks, many of which have been brought to their knees by heavy lending to failed property projects and a second recession since 2009. "The market continues to function, but on this evidence there is still no significant change in sentiment or investor demand towards Spanish debt," said Chatwell. Altogether three euro zone governments auctioned debt on Thursday morning, shortly before the European Central Bank cut interest rates. French borrowing costs held close to historic lows at its auction on Thursday of 7.8 billion euros of bonds, a day after it announced hefty tax rises on the wealthy to try to bring its growing budget deficit under control. "Sentiment-wise, France is a world apart from the woes of Spain and Italy," said Nicholas Spiro of consultancy Spiro Sovereign Strategy. At a Brussels summit, the euro zone leaders agreed to let the bloc's EFSF and ESM bailout funds buy bonds in secondary markets and directly recapitalize banks. This should help Madrid to rescue its banks without suffering the fate of Ireland, which had to take a full bailout of the state in November 2010 and impose punishing austerity policies demanded by the European Union and IMF. Spain secured EU aid of up to 100 billion euros last month earmarked for rescuing banks. However, both this and the Brussels deal are short on details, and Finnish reservations have dampened the initial positive reactions. With Madrid struggling to meet targets for cutting its budget deficit, investors remain worried that Spain, the euro zone's fourth-biggest economy, will eventually join Ireland, Greece, Portugal and Cyprus in needing a sovereign bailout. "Irrespective of the (bank) bail-out - which has yet to be finalized - Spain is caught in a pernicious circle," said Spiro. The weakness of public finances, the depth of the downturn and the vulnerability of parts of the banking sector are all feeding on each other. That the government plans yet more austerity will only make matters worse in the short-term. Domestic banks - including some in line for bailout funds - have been the main buyers at Spanish bond auctions since the European Central Bank injected nearly 1 trillion euros of cheap credit in December and February into liquidity-starved lenders. Some "fast money" players such as hedge funds piled into the market after the Brussels summit to close out bets on Spanish bonds falling further. However, traders say they have not seen any buying of the paper from longer-term foreign investors. Spanish banks raised their holdings of domestic sovereign debt to from 16.9 percent of the total in circulation in December to 29.2 percent in March. By contrast, Ireland said foreign investors had backed its return to short-term debt markets on Thursday. In a tentative first step following a nearly two-year hiatus, Ireland sold 500 million euros of treasury bills at an average yield of 1.8 percent. This compared with Spain's sale last week of three-month debt at an average yield of 2.36 percent, while fellow struggler Italy had to pay 2.96 percent to auction six-month paper a day later. We are encouraged by the strong demand and the presence of significant international interest in today's auction. However, we are conscious that this is only the first step towards our ultimate goal of full access to the capital markets," NTMA Chief Executive John Corrigan said in a statement. Corrigan gave no figure for international demand. However, he said Ireland hoped to hold three or four more short-term auctions this year with the aim of returning to long-term debt markets in a two-year plus issue in early 2013. Corrigan told RTE radio that Dublin had to stick to the terms of its bailout deal under the watchful eye of inspectors from the "Troika" - the European Commission, ECB and IMF - but much also depended on the wider euro zone crisis. "Accessing the longer-term bond markets is critically dependent on two factors: one of which is largely within our own control, that's sticking to the troika program, and the second one is the wider mood music in Europe, which in fairness has significantly improved since the summit at the weekend," he said. Ireland, unlike the rest of the bailout club, was able to deliver modest economic growth last year amid turmoil across the euro zone. Analysts have cautioned that the real test for the NTMA will be maintaining regular access to the market without another twist in the euro zone's debt crisis forcing a damaging withdrawal. Ireland is hardly out of the woods. Domestic demand continues to contract, the fiscal deficit was 13 percent of GDP last year, and the economy is expected to more or less stagnate this year," said Spiro. Yields on benchmark Irish 2020 bonds have fallen by almost 100 basis points since the summit and were almost 30 basis points lower than their Spanish counterparts at 6.27 percent before of the auction, little changed from Wednesday. Additional reporting by Kirsten Donovan; in London; Writing by David Stamp; Editing by Will Waterman