Definition. Spent Supply Distribution (SSD) Quantiles report the cost-basis distribution of supply being spent at a given timestamp, partitioned into 100 quantiles (percentiles). Each quantile line names the acquisition price below which a given fraction of the spent supply was originally acquired, illustrating the price levels at which assets currently moving in the market were originally bought.

Technical. All CBD and SSD metrics use an address-based approach, analyzing holdings at the wallet-address level for consistency across digital assets and comparability across blockchain architectures. This contrasts with the UTXO-based approach used in metrics like URPD that categorize supply based on unspent transaction outputs, so values for UTXO-based assets may show small deviations across the two methods.

Interpretation. The quantile lines mark acquisition-price levels where current spending is concentrated, identifying where profit-taking or loss realization is occurring.