Asian stocks fell sharply on Thursday after soaring Italian borrowing costs stoked fears the debt crisis in the euro zone's third biggest economy will overwhelm its financial defences, raising the risk of a break-up of the currency area.

The euro was steady, after suffering its biggest daily drop in 15 months on Wednesday, while industrial commodities such as copper and oil softened on worries of renewed recession.

Asian credit spreads blew out as the deepening crisis in Europe sapped investor appetite for risk, while safe haven assets such as Japanese government bonds were in demand.

Whatever they come up with, it doesn't avoid a European recession, said Su-Lin Ong, senior economist at RBC Capital Markets in Sydney.

The question now is just how deep it will be and whether this is going to bleed over into the banking system, because that is much more significant.

Tokyo's Nikkei share average <.N225> fell 2.4 percent, while MSCI's broadest index of Asia Pacific shares outside Japan <.MIAPJ0000PUS> lost 3.2 percent.

Hong Kong's Hang Seng Index <.HSI> was the biggest regional loser, falling 4.4 percent, as European woes were exacerbated by data showing China's exports rose at their weakest pace in 8 months in October. Europe is China's biggest export market.

Italy has for the time being replaced Greece as the biggest source of concern in Europe's two-year-old debt crisis.

Italian 10-year bond yields rose above 7 percent on Wednesday, a level most market economists consider unsustainable for financing debt of more than 2 trillion euros.

A pledge by Italy's Prime Minister Silvio Berlusconi to stand down failed to reassure bond markets that Rome has the will to bring its debts under control, and moves by two major clearing houses to raise the level of collateral needed for holders of Italian debt pushed the country near breaking point.

European and U.S. stocks fell steeply on Wednesday in response, with Wall Street shares losing more than 3 percent.

TOO BIG TO BAIL

Ireland and Portugal were both forced to seek aid soon after their 10-year bond yields topped 7 percent, but a rescue for Italy would be on a different scale and Europe's bailout fund is widely considered inadequate for the task.

The European Central Bank (ECB), considered the only institution capable of repelling the bond market attacks, bought Italian bonds in substantial amounts on Wednesday, but is reluctant to go further to force down yields.

The markets were basically in a panic yesterday and the only thing that can give the euro at least a temporary respite is quick action from the ECB to lower Italian yields, said Koji Fukaya, chief currency strategist at Credit Suisse in Tokyo.

Whilst many outside Europe are calling on the ECB to take a more active role, as other major central banks do, in acting as lender of last resort, Germany remains implacably opposed to what it views as a threat to the central bank's independence.

In a sign of the depth of fear gripping European capitals, EU sources told Reuters that French and German officials had held discussions about a euro zone split.

The single currency was steady around $1.3540, after tumbling around 2 percent on Wednesday.

The dollar was also steady against a basket of currencies <.DXY>, after surging in the previous session as investors scurried for safety, while yields on 10-year Japanese government bonds fell 0.5 basis point to 0.970 percent.

In Asian credit markets, spreads widened on the Asia ex-Japan iTraxx investment grade index, a gauge of risk appetite.

Concerns about flagging demand knocked London Metal Exchange copper down 2.5 percent. U.S. crude oil fell 0.3 percent to $95.43 a barrel, while Brent crude dipped 0.1 percent to around $112.21.

(Additional reporting by Miranda Maxwell in Melbourne and Antoni Slodkowski in Tokyo; Editing by Ramya Venugopal)