Washington ? The Federal Deposit Insurance Corp. is weighing several costly — and never-before-used — options as it struggles to shore up the dwindling fund that insures bank deposits.

The agency is considering borrowing billions from healthy banks. Alternatively, it may impose a special fee on the banking industry.

Each option carries risk: Drawing money from healthy banks would take dollars out of the private sector, making that money unavailable for investment in the weak economy. But charging the whole industry a fee to replenish the fund could push weaker banks toward failure.

A third option — borrowing from the Treasury — is politically unpalatable, since it would resemble another taxpayer-financed bailout.

A fourth option would be to have banks pay their regular insurance premiums early. But this idea wouldn’t solve the fund’s long-term cash needs.

“The bottom line is, there’s no good solution,” said Jaret Seiberg, an analyst with the research firm Concept Capital.