Two of the world's leading benchmark index compilers are closely monitoring the level of free float in Hong Kong-listed shares following the Government's $118.13 billion market intervention.
The Government's vow to keep its holdings for a prolonged period has sparked the attention of the International Finance Corp (IFC) and Morgan Stanley Capital International.
The IFC, the private-sector arm of the World Bank, compiles emerging market investable indices based on how much stock is available to foreign investors.
It said it had become concerned because it includes Hong Kong-listed H shares and red chips in its IFCI China Index.
It said the shares of four firms falling into these categories had been bought by the Government, potentially affecting their weightings.