Realised Loss estimates the US-dollar loss carried by Bitcoin outputs when they are spent below the market price at which those inputs were created. It adds the loss across qualifying coins moved during the chosen period.

Most datasets report Realised Loss as a positive magnitude even though it represents a negative outcome. Some charts draw it below zero for readability, so the axis convention should always be stated.

How Realised Loss is calculated

Formula. Sum of BTC value × (price when previously created − price when spent), for spent outputs whose current spend price is lower than their previous creation price.

The earlier creation price acts as an on-chain cost-basis proxy. If an output created when Bitcoin traded at a higher price is later spent at a lower one, the model records the difference as realised loss.

What a large reading means

A large print shows that coins with higher reference prices are moving at materially lower prices. It can reflect forced selling, risk reduction, panic, tax activity, custody movement or ordinary transactions; the chain does not reveal which explanation applies.

During sharp drawdowns, sustained Realised Loss can help identify capitulation-like behaviour. The better question is not simply whether the reading is high, but whether price continues to fall while the loss is realised or begins to stabilise despite it.

What Realised Loss does not tell you

A spike does not guarantee a bottom. Loss realisation can remain elevated through several waves, and price can continue lower after an apparently extreme day.

The metric is also a nominal dollar total. Bitcoin’s price, circulating supply and transaction sizes have changed considerably across cycles, so raw historical records are not automatically comparable. Normalised measures, cohort splits and moving averages can provide better context.

How to read it

Historically high. A large dollar loss is being realised; look for persistence, cohort concentration and the response in price.

Rising with falling price. Loss-taking is expanding as the market declines, consistent with increasing stress.

High while price stabilises. Heavy loss-making movement is being absorbed without an equivalent new decline; potentially important, but not proof of a bottom.

Low. Few coins are moving below their reference prices, the average loss is small or transaction activity is subdued.

Isolated spike. One event or entity may dominate the day, particularly in an unadjusted dataset.

Realised Loss updates daily inside the Profit & Loss dashboard, beside Realised Profit, Net Realised Profit/Loss, SOPR and cohort views.

Common questions

Is Realised Loss always shown as a negative number?

No. It is commonly published as a positive loss magnitude. A provider may invert it below zero for charting, so check the definition before comparing series.

Does a large loss spike mark the market bottom?

No. It records stress among spent coins. A durable bottom needs evidence from price, persistence, demand and other on-chain measures.

How is Realised Loss different from Supply in Loss?

Realised Loss measures dollar loss when underwater coins move. Supply in Loss measures the BTC balance currently below its last-moved-price proxy, whether it moves or not.

Can a transfer between a person’s own wallets create realised loss?

Yes in a raw UTXO dataset. Entity adjustment can filter some self-churn, but ownership clustering remains an estimate.

What should I pair it with?

Use Realised Profit and the net series for direction, SOPR for relative spending outcomes, Supply in Loss for the unrealised balance and price for evidence of absorption.