China’s sovereign wealth fund bought exchange-traded funds on Monday, expanding its purchases beyond bank shares as authorities step up attempts to boost the country’s slumping stock market. Central Huijin Investment Ltd., a unit of the $1.4 trillion wealth fund China Investment Corp. that’s long served as the main vehicle for China’s holdings in state-run banks, bought an undisclosed amount of ETFs and vowed to keep increasing its holdings, it said in a brief statement late Monday. Huijin may have purchased 10 billion yuan ($1.4 billion) in ETFs, the China Fund newspaper reported Tuesday, citing brokerage estimates. ... (full story)