To Rally Stocks, China Moves to Ease Foreign Trading Rules
China plans to ease restrictions on overseas investors buying yuan-denominated shares, seeking to attract funds after Shanghai and Shenzhen stock indexes slumped to five-year low in early September; State Administration of Foreign Exchange will make it easier for institutions to transfer money out of and into China and will also increase number of approved yuan investors; yuan-denominated Class A shares traded on Shanghai and Shenzhen exchanges are open only to handful of approved foreign institutions under quota system; Class B shares trade on both exchanges in foreign currencies, and are open to overseas investors; ABN Amro Holding and Societe Generale win approval to invest combined $125 million in yuan shares, bringing to $2.85 billion total investment permitted under market-opening plan; photo (M)