Auto-Deleveraging (ADL) on BULK Exchange: What It Is and When It Triggers

Auto-deleveraging (ADL) on BULK Exchange is a mechanism of last resort that triggers only when the insurance fund cannot cover a liquidation shortfall. Per the architecture documentation, ADL is described as “an exceptionally rare event.”

This page explains the trigger conditions, who gets deleveraged, and how to reduce your ADL risk.

The Liquidation Hierarchy

BULK Exchange handles undercollateralized positions through three escalating mechanisms:

1. Liquidation optimizer — normal liquidation. Closes the most impactful positions through the market. No special intervention. Covers the vast majority of liquidation events.

2. Insurance fund — if the liquidation produces a loss exceeding the account’s collateral (a “shortfall”), the insurance fund covers the gap. The liquidated trader loses their margin but doesn’t owe more.

3. ADL — if the insurance fund is depleted OR if there isn’t enough order book liquidity to execute the liquidation, ADL triggers. Only at this point does BULK Exchange reduce positions of profitable traders to cover the shortfall.

What Triggers ADL

Two specific conditions can trigger ADL:

Condition 1: Insurance fund insufficient A single large liquidation creates a shortfall larger than the insurance fund can cover. This requires an unusually large position to be liquidated in a rapidly moving market with insufficient order book depth.

Condition 2: Insufficient order book liquidity The liquidation algorithm cannot find enough liquidity to close the position at a reasonable price. This typically happens with large positions on low-liquidity markets during periods of extreme volatility.

In both cases, BULK Exchange automatically reduces positions of other traders to absorb the excess exposure.

Who Gets ADL’d and In What Order

ADL does not randomly select traders. The ranking is:

Priority for ADL: Traders with the highest (Unrealized PnL × Leverage) score are deleveraged first.

The logic: traders benefiting most from the imbalance (high PnL on highly leveraged positions) are the most appropriate candidates to absorb the socialization of the loss. The trader capturing the most value from the market condition that led to the ADL event contributes proportionally to resolving it.

How ADL reduces your position:

Your position is reduced by the minimum amount necessary to resolve the shortfall, not necessarily closed entirely. The reduction happens at the mark price at the time of ADL.

How to Minimize ADL Risk

ADL is rare, but it can be minimized:

1. Prefer lower leverage on positions that are deeply in profit. A $50k profit on a 50x position has maximum ADL ranking. The same profit on a 5x position has 10x lower ADL score.

2. Use take-profit orders. If your position reaches your profit target, close it. An open position that was in high profit but you didn’t close is the worst scenario for ADL.

3. Monitor your position in extended trends. If you’re short in a strong bear market and your position is highly profitable, consider closing or reducing — you have the highest ADL score in the market.

4. Prefer portfolio margin on hedged positions. Hedged positions don’t compound ADL risk because the PnL of one leg partially offsets the other.

ADL Notification

BULK Exchange displays real-time ADL ranking in the interface. Higher ranking = more likely to be deleveraged first if ADL occurs. Monitor this when holding highly profitable leveraged positions.

When ADL occurs, BULK Exchange announces it via the exchange interface in real time. Affected accounts receive notification of the position reduction and the mark price at which it occurred.

Comparison With Hyperliquid

Both BULK Exchange and Hyperliquid use insurance funds + ADL as the backstop mechanism. The ordering logic (highest PnL × leverage deleveraged first) is industry standard.

The difference: BULK’s liquidation optimizer specifically tries to avoid insurance fund drain by preserving hedges and targeting efficient position reduction. This should reduce ADL frequency compared to a naive liquidation engine that drives more shortfalls.

Frequently Asked Questions

What is ADL on BULK Exchange? Auto-deleveraging (ADL) is a last-resort mechanism that reduces the positions of profitable leveraged traders when the insurance fund cannot cover a liquidation shortfall. Described as “an exceptionally rare event” in BULK’s documentation.

Who gets auto-deleveraged on BULK Exchange? Traders with the highest PnL × leverage score are deleveraged first. The system targets positions that are most beneficial from the market condition that caused the shortfall.

Can I avoid being ADL’d? You can reduce your ADL probability by using lower leverage on highly profitable positions, closing positions when targets are reached, and using hedged strategies that reduce your effective ADL ranking score.

Does ADL happen at market price? ADL occurs at the mark price at the time of the event, not necessarily at a price favorable to the deleveraged trader. The position reduction happens at a defined, observable price.

Source: BULK Exchange architecture documentation. Last updated: June 7, 2026.