Interfund borrowing

If at any time prior to January 1988 the Managing Trustee determines that borrowing authorized under this subsection is appropriate in order to best meet the need for financing the benefit payments from the Federal Old-Age and Survivors Insurance Trust Fund or the Federal Disability Insurance Trust Fund, the Managing Trustee may borrow such amounts as he determines to be appropriate from the other such Trust Fund, or, subject to paragraph (5), from the Federal Hospital Insurance Trust Fund established under section 1395i of this title , for transfer to and deposit in the Trust Fund whose need for financing is involved.

In any case where a loan has been made to a Trust Fund under paragraph (1), there shall be transferred on the last day of each month after such loan is made, from the borrowing Trust Fund to the lending Trust Fund, the total interest accrued to such day with respect to the unrepaid balance of such loan at a rate equal to the rate which the lending Trust Fund would earn on the amount involved if the loan were an investment under subsection (d) (even if such an investment would earn interest at a rate different than the rate earned by investments redeemed by the lending fund in order to make the loan).

(A) If in any month after a loan has been made to a Trust Fund under paragraph (1), the Managing Trustee determines that the assets of such Trust Fund are sufficient to permit repayment of all or part of any loans made to such Fund under paragraph (1), he shall make such repayments as he determines to be appropriate.

(B) (i) If on the last day of any year after a loan has been made under paragraph (1) by the Federal Hospital Insurance Trust Fund to the Federal Old-Age and Survivors Insurance Trust Fund or the Federal Disability Insurance Trust Fund, the Managing Trustee determines that the OASDI trust fund ratio exceeds 15 percent, he shall transfer from the borrowing Trust Fund to the Federal Hospital Insurance Trust Fund an amount that— (I) together with any amounts transferred from another borrowing Trust Fund under this paragraph for such year, will reduce the OASDI trust fund ratio to 15 percent; and (II) does not exceed the outstanding balance of such loan. (ii) Amounts required to be transferred under clause (i) shall be transferred on the last day of the first month of the year succeeding the year in which the determination described in clause (i) is made. (iii) For purposes of this subparagraph, the term “OASDI trust fund ratio” means, with respect to any calendar year, the ratio of— (I) the combined balance in the Federal Old-Age and Survivors Insurance Trust Fund and the Federal Disability Insurance Trust Fund, as of the last day of such calendar year, to (II) the amount estimated by the Commissioner of Social Security to be the total amount to be paid from the Federal Old-Age and Survivors Insurance Trust Fund and the Federal Disability Insurance Trust Fund during the calendar year following such calendar year for all purposes authorized by this section (other than payments of interest on, and repayments of, loans from the Federal Hospital Insurance Trust Fund under paragraph (1), but excluding any transfer payments between such trust funds and reducing the amount of any transfer to the Railroad Retirement Account by the amount of any transfers into either such trust fund from that Account).

(C) (i) The full amount of all loans made under paragraph (1) (whether made before or after January 1, 1983 ) shall be repaid at the earliest feasible date and in any event no later than December 31, 1989 . (ii) For the period after December 31, 1987 , and before January 1, 1990 , the Managing Trustee shall transfer each month to the Federal Hospital Insurance Trust Fund from any Trust Fund with any amount outstanding on a loan made from the Federal Hospital Insurance Trust Fund under paragraph (1) an amount not less than an amount equal to (I) the amount owed to the Federal Hospital Insurance Trust Fund by such Trust Fund at the beginning of such month (plus the interest accrued on the outstanding balance of such loan during such month), divided by (II) the number of months elapsing after the preceding month and before January 1990. The Managing Trustee may, during this period, transfer larger amounts than prescribed by the preceding sentence.

(A) No amounts may be borrowed from the Federal Hospital Insurance Trust Fund under paragraph (1) during any month if the Hospital Insurance Trust Fund ratio for such month is less than 10 percent.

(B) For purposes of this paragraph, the term “Hospital Insurance Trust Fund ratio” means, with respect to any month, the ratio of— (i) the balance in the Federal Hospital Insurance Trust Fund, reduced by the outstanding amount of any loan (including interest thereon) theretofore made to such Trust Fund under this subsection, as of the last day of the second month preceding such month, to (ii) the amount obtained by multiplying by twelve the total amount which (as estimated by the Secretary) will be paid from the Federal Hospital Insurance Trust Fund during the month for which such ratio is to be determined (other than payments of interest on, or repayments of loans from another Trust Fund under this subsection), and reducing the amount of any transfers to the Railroad Retirement Account by the amount of any transfer into the Hospital Insurance Trust Fund from that Account.