Shares in China's banks fell sharply Monday after news reports said its No. 2 lender, Bank of China, might write down holdings of U.S. mortgage securities and two others increased reserves for possible losses.
The reports were the first indication that Chinese lenders, which have so far avoided damage from the U.S. credit crisis, might face problems due to their holdings of subprime securities.
Also Monday, China's banking regulator warned that lenders might face risks from fluctuations in fast-rising real estate prices. (In China)
Bank of China is expected to announce a "significant writedown" on its $7.95 billion in U.S. subprime mortgage securities, Hong Kong's South China Morning Post newspaper reported, citing unidentified sources.
Bank of China spokesman Wang Jianping declined to comment. He said the bank would release details of its assets in late March when it announces annual earnings.
Bank of China shares fell 4.1 percent in Shanghai market and by 6.4 percent in Hong Kong. China's biggest banks are listed in both cities, with shares in Shanghai off-limits to most foreign investors, while Hong Kong is open to global traders.
The fall in bank stocks helped to drive overall market declines in both cities, with Shanghai's main index sinking 5.1 percent and Hong Kong plunging 5.5 percent -- its biggest percentage drop since 2001.
"The subprime woes in the U.S. have raised concerns at home about risks in the domestic mortgage market and prompted selling in banking and real estate companies," said Wang Junqing, an analyst at Guosen Securities in Shanghai.
Bank of China, China's biggest owner of subprime mortgage securities, said in October they were 3.05 percent of its total holdings. The bank said it had set aside $473 million for potential writedowns.