HONG KONG/LONDON (Reuters) -Growing worries about defaults at Chinese property developers triggered a rout in their shares and bonds on Tuesday with fresh credit rating downgrades and uncertainty about the fate of cash-strapped China Evergrande Group sapping investor sentiment. Once China’s top-selling developer, Evergrande is facing one of the country’s largest-ever debt restructurings as it wrestles with more than $300 billion in liabilities, including nearly $20 billion in offshore debt. Last month it missed coupon payments on two dollar bond tranches and is scrambling to sell assets to pay creditors, prioritising repayment to onshore lenders in the last few weeks. The possible collapse of one of China’s biggest borrowers has triggered worries about contagion risks to the property sector in the world’s second-largest economy, as its debt-laden peers are hit with rating downgrades on looming defaults. Chinese property bonds and shares came under heavy selling pressure, a day after Chinese homebuilder Fantasia Holdings’ said it had failed to make a $206 million international market debt payment on time. That followed downgrading of the company by rating agencies, citing weak recovery prospects for bondholders after default as well as concerns about the company’s disclosure and governance practices. In a statement, the property developer said that it will assess the potential impact of the non-payment on the group’s financial conditions. It did not immediately respond to a Reuters request for comment on the rating downgrades. Developer Sinic Holdings also suffered a ratings downgrades on Tuesday after it announced that certain subsidiaries had missed interest payments on onshore financing arrangements. S&P Global Ratings lowered its rating on Sinic, saying it had run into a “severe liquidity problem and its debt-servicing ability has almost been depleted”. It said the firm was likely to default on notes totalling $246 million due on Oct. 18. Sinic declined to comment on the ratings downgrades. “Since the Evergrande crisis, investors have become more worried and focused about Chinese developer’s repayment ability,” said Thomas Kwok, head of equity business at Hong Kong brokerage CHIEF Securities. The liquidity issues have increased as many developers were not able to issue fresh debt to refinance, and as their ability to raise cash from selling properties fell due to new regulations, he said. “This will be a vicious cycle for the developers that are not strong enough, because there is not enough liquidity in the market for everyone.” MARKET IMPACT The rating downgrades and possible near-term defaults on offshore debt obligations will pile pressure on Chinese developers to access fresh funding to repay notes worth nearly $300 billion here due over the next two years. Bond prices collapsed at a handful of the most indebted firms, with Fantasia bonds crumbling below 30 cents on the dollar while Kaisa Group and Central China Real Estate also saw price falls.The cost of insuring exposure to China’s sovereign debt also came under pressure, and five-year credit default swaps jumped 4 basis points to a 16-month high, IHS Markit data showed. “The cost of funding has increased massively for all these companies and it is actually a contagion risk,” said an emerging markets credit analyst in London, declining to be named. “If the whole property sector comes under pressure it could become a much bigger issue to resolve, so I think it is better Chinese authorities step in now and try and limit the fallout.” China is on seven-day holiday from Oct. 1, and regulators there have not made any comment specifically on Evergrande and its woes in recently. The central bank, however, on Wednesday urged financial institutions to cooperate with relevant departments and local governments to maintain the “stable and healthy” development of the property market and safeguard housing consumers’ interests. An index of China high-yield debt, which is dominated by developer issuers, fell to its lowest since the pandemic drawdown in 2020, and has lost almost 20% since May - while comparable U.S. and European indexes have rallied. An index tracking Hong Kong-listed mainland property stocks fell 1.8% on Tuesday, compared to a 0.3% gain in the local benchmark. Shares in Guangzhou R&F Properties and Sunac China Holdings each fell by about 10%. Shares in Evergrande’s electric vehicle unit eased after jumping on Monday. Evergrande’s dollar bonds have firmed marginally over recent days but remain at distressed levels below 30 cents on the dollar. EVERGRANDE DEAL Renewed investor concerns about the outlook for the debt-laden property sector, which accounts for a quarter of China’s gross domestic product, comes as Evergrande shares remained suspended for the second day. Evergrande requested a halt in the trading of its shares on Monday pending an announcement about a major deal. Evergrande Property Services Group also requested a halt referring to “a possible general offer” for company shares. State-backed Global Times said Hopson Development was the buyer of a 51% stake in the property business for more than HK$40 billion ($5.1 billion), citing unspecified other media reports. Evergrande declined to comment ahead of an official announcement. The $5 billion Evergrande is likely to get from the reported stake sale would theoretically cover its near-term offshore bond payments. It has $500 million in bond coupons due by year-end, followed by a $2-billion dollar bond maturity in March. Analysts have said the potential Evergrande deal signals the company was still working to meet its obligations. But any fire-sale of its assets would further amplify concerns about the rest of China’s property sector and the broader economy. Under Hong Kong’s listing requirements, there is no specific timeline within which a company has to make a filing after requesting a stock trading halt, which can remain suspended for days.