By selling and immediately buying back some of its gold reserves, the central bank of Curaçao and Saint Martin managed to use its gold revaluation account to offset losses in 2021. Because many other monetary authorities are currently making losses too—and there is no limit to revaluing gold against fiat money—this trick could be used the world over to heal central banks’ balance sheets.

https://www.zerohedge.com/commodities/how-central-bank-recently-used-its-gold-revaluation-account-cover-losses