At present, customers can use cash, Exchange Fund Bills and Notes, or a combination to meet margin requirements.
Like the other highly liquid assets that are accepted as margin collateral, the value of the US Treasury securities will be based on HKCC Rules and Procedures, which include adjustments to reflect the potential for the securities' value to decline.
"The acceptance of US Treasury securities will allow customers to use their capital more efficiently and it will give them more flexibility," a HKFE spokesman said.
"The changes are part of the Exchange's continuing efforts to broaden its international focus to meet the needs of today's marketplace," the spokesman added.