Revaluations under US GAAP

Hi all, Quick Q. Does USGAAP allow revaluation of inventories? I know it does not allow impairment reversal (while IFRS does) but how about inventories?

Only downwards I think. Inventory is held at the lower of nrv and market under GAAP… I hope.

I believe no writeups are allowed for subsequent recoverty under GAAP

US GAAP Lower of cost or Market, IFRS Net realizable value…essentially the samething

cheers chung