HSBC Holdings PLC faces another round of questions about how it will offer prime loans through Household International Inc. if its $14.2 billion deal to buy the Prospect Heights, Illinois-based consumer lender gets the green light.

The Office of the Comptroller of the Currency - the sole federal bank regulator involved in approving the deal - asked the London financial services company to provide more details about its January announcement to state regulators that it would "make prime products available to eligible customers ... at Household locations."

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