outstanding amount of benefit liabilities
(19) “outstanding amount of benefit liabilities” means, with respect to any plan, the excess (if any) of— (A) the value of the benefit liabilities under the plan (determined as of the termination date on the basis of assumptions prescribed by the corporation for purposes of section 1344 of this title ), over (B) the value of the benefit liabilities which would be so determined by only taking into account benefits which are guaranteed under section 1322 of this title or to which assets of the plan are allocated under section 1344 of this title ;