§ 553. Setoff
(a)
Except as otherwise provided in this section and in sections
362 and
363 of this title, this title does not affect any right of a creditor to offset a mutual debt owing by such creditor to the debtor that arose before the commencement of the case under this title against a claim of such creditor against the debtor that arose before the commencement of the case, except to the extent that—
(b)
(1)
Except with respect to a setoff of a kind described in section
362
(b)(6),
362
(b)(7),
362
(b)(17),
362
(b)(27),
555,
556,
559,
560,
561,
365
(h),
546
(h), or
365
(i)(2) of this title, if a creditor offsets a mutual debt owing to the debtor against a claim against the debtor on or within 90 days before the date of the filing of the petition, then the trustee may recover from such creditor the amount so offset to the extent that any insufficiency on the date of such setoff is less than the insufficiency on the later of—
(c)
For the purposes of this section, the debtor is presumed to have been insolvent on and during the 90 days immediately preceding the date of the filing of the petition.