Auto-Deleveraging and Platform Solvency
What happens when a liquidation cannot be closed normally, and how Hyperliquid's ADL mechanism contains residual risk.
Most liquidations can be closed by the market or absorbed through Hyperliquid's liquidation infrastructure. Extreme moves can create a harder problem: what happens if a bankrupt position cannot be closed before its losses exceed available collateral?
Hyperliquid uses auto-deleveraging, or ADL, as a backstop for this tail-risk case.
ADL transfers tail risk to opposing traders
When ADL is triggered, profitable traders on the opposite side can have part of their position closed against the distressed position. This reduces the system's unmatched exposure without requiring the protocol to promise unlimited insurance.
The mechanism is undesirable for the selected trader because a profitable position can be reduced earlier than intended. Its purpose is system solvency under exceptional conditions, not normal execution.
Ranking matters
ADL does not choose traders randomly. Hyperliquid ranks eligible positions using profitability and leverage-related criteria. Traders taking large, highly profitable leveraged exposure are more likely to sit higher in the queue.
An ADL indicator is therefore a useful risk signal during stressed markets.
Why this is different from liquidation
A liquidation closes an undercollateralized account. ADL affects a solvent trader on the opposite side because the normal liquidation path could not contain the bankrupt position.
For institutions and market makers, ADL belongs in execution-risk models. A hedge that is assumed to remain open through a crisis may be partially reduced if the system reaches its backstop conditions.
The important question is not whether a venue has tail-risk machinery, but how that machinery allocates losses and forced position changes when ordinary liquidation liquidity is insufficient.