No, they received gold and silver bullion. That is what they need to return. Had gold and silver went down, they would not return the dollar value when received, and eat the loss. If Qenta where to keep the appreciation for itself, the trustee would need to file an arbitration in NY against Qenta for unjust enrichment, and reclaim that gain for the bank's customers. If he won't I have standing to do it myself, as I signed the purchase and assumption agreement. But since Qenta wrote they will return assets "as originally received" that clearly implies they will return gold and silver bullion, as that is how they originally received the assets.