* Banks' Tier 1 would be 5.1 pct in 2010 in worst scenario
* Worst case T1 ratio of 6 pct if banking package exhausted
* Bad debt 10 pct in Austria, 20 pct in CEE in stress test
(Adds quote, detail, background)
By Boris Groendahl
VIENNA, July 6 (Reuters) - Top Austrian banks' core capital ratios would drop to an average 5.1 percent next year if they raised no fresh funds in a worst-case stress test based on a sharp rise in emerging European bad debt, the central bank said.
Austria's top lenders would have to tap Austrian state funds or markets in such a scenario -- which makes more pessimistic assumptions for economic and bad debt developments than the baseline scenario -- to reach the capital levels markets demand.
However, Austria's central bank, which supervises some of emerging Europe's biggest lenders, said the stress test scenario was not its forecast, and that at the moment it did not foresee Austria's main banks needing additional capital.
"We conclude that in our view there is no further recapitalisation need right now," said Andreas Ittner, the central bank's head of banking supervision.
"However, we will continuously monitor the real development of capital requirements," he said. He added that even under the baseline scenario, the central bank expected bad debts to rise.
Western banks own the biggest lenders almost everywhere in the parts of Europe formerly under communist control. Italy's UniCredit <CRDI.MI>, via its Bank Austria arm, and Austria's Raiffeisen International <RIBH.VI> and Erste Group Bank <ERST.VI> top the list of the biggest banks in the region by some distance. [
]The other main Austrian banks are Oesterreichische Volksbanken <OTVVp.VI>, BayernLB's [
] Hypo Group Alpe Adria and Cerberus Capital's [ ] BAWAG P.S.K.Austria has set up one of the biggest bank stability packages in Europe relative to the size of its economy, offering 15 billion euros ($21 billion) in capital injections and 75 billion in bond guarantees.
Only part of the 15 billion euros in equity has been tapped so far, and if it was exhausted under the stress test scenario, the top six banks' Tier 1 capital ratio would be at 6 percent in 2010, the central bank said.
In any case, none of the banks would drop below the legal minimum Tier 1 capital ratio of 4 percent, a level that is significantly less than what markets expect.
PESSIMISTIC STRESS TEST
The central bank said its stress test assumed a 10 percent contraction in emerging Europe's economies over this year and next, compared with a 4.3 percent drop forecast by the International Monetary Fund.
This would translate into non-performing loans rising to 20 percent of total loans in emerging Europe -- more than three times the current level -- and to 10 percent in Austria, twice what they are now, it said.
On top of rising bad debts, the stress tests assumed declining profits because of depreciating currencies, and a rise in risk-weighted assets because of deteriorating asset quality.
"We incorporated a drastic recession scenario in Eastern Europe into the outlooks," Ittner said.
"We don't expect that this will materialise, but we think that 5 percent (Tier 1 capital ratio in case it does) in 2010 is a decent result compared with other European countries," Ittner said. "We'll review the situation later this year."
The IMF and the Organisation for Economic Cooperation and Development (OECD) both said last week that Austrian banks should raise their capital buffers as bad debt is on the rise in Austria and emerging Europe. [
] [ ]The IMF in April forecast that companies and governments in emerging Europe had to refinance $579 billion in debt this year, or 19 percent of the region's gross domestic product. Non-performing loans and corporate defaults are rising already.
The IMF also forecast asset writedowns in emerging Europe would climb to $185 billion and translate into bank recapitalisation needs of $102 billion, an estimate that roughly tallies with what analysts predict. (Editing by John Stonestreet and Will Waterman) ($1=.7154 Euro)