Net Unrealized Loss (NUL) measures the aggregate unrealized loss held across all UTXOs currently underwater - calculated by summing the product of each UTXO's value and the negative price difference between when it was created and destroyed, normalized by market capitalization. Unlike NUPL, which captures the net position of the entire market, NUL isolates only the loss-side of the ledger, reflecting the scale of pain being carried by holders whose cost basis exceeds current market price.
A rising NUL indicates that an increasing share of circulating supply is sitting in unrealized loss relative to market cap - historically associated with capitulation risk as underwater holders face growing pressure to exit positions and realize losses. When NUL reaches extreme levels, it signals that the market has absorbed significant drawdown across a wide base of participants, a condition that has historically marked or closely preceded major cycle bottoms as loss realization peaks and selling exhaustion sets in.
Read alongside NUPL and Net Unrealized Profit, NUL provides the loss-side decomposition of overall market positioning - identifying when the scale of underwater supply is large enough to represent a structurally significant capitulation signal, and helping distinguish between early-stage drawdowns where losses are still modest and late-stage bear conditions where unrealized loss accumulation has reached historically extreme levels.
