Definition. 90D Coin Days Destroyed (CDD-90) is the 90-day rolling sum of Coin Days Destroyed (CDD), age-adjusted by normalizing for time to account for the increasing destructible-coin-age baseline as the network ages. Entity-Adjusted 90D Coin Days Destroyed (eCDD-90) is the entity-adjusted counterpart.

Technical. Coins returned to the sending address within the same transaction are not counted as spent.