How Liquidations Work

Liquidation is the process by which an exchange forcibly closes a trader's position when margin falls below the maintenance level. It prevents losses from one position creating bad debt that affects other users.

The basics: you open a 10x leveraged long in ETH-PERP worth $10,000, posting $1,000 margin. If ETH drops and your unrealized loss approaches $1,000, the exchange intervenes before the position goes underwater. The trigger is the maintenance margin requirement — the minimum margin relative to position value. When account equity falls below this threshold, the liquidation engine activates.

What happens next — how much gets liquidated — is where exchanges differ significantly.

Full Liquidation: The Blunt Instrument

Most perpetual exchanges have historically used full liquidation. When your position hits the threshold, everything closes. A $100,000 position is entirely unwound regardless of whether closing a fraction would restore account health.

Full liquidation is simple and conservative from the exchange's perspective, but it is harshly punitive for traders:

Direct cost. Liquidation executes at prices worse than mark — there is a fee for the insurance fund, and forced orders cause slippage. On a full liquidation of a large position, slippage is substantial. The trader pays execution costs on the entire size even if a small reduction would have sufficed.

Market impact. A full liquidation dumps the entire position as a forced order. A whale's $5 million long liquidation hits the book and drives price down.

Cascade effect. This is the most dangerous consequence. Price drops cause liquidations, liquidations cause larger price drops, which cause more liquidations. A 2% fundamental move can become a 10% candle as cascading liquidations amplify the initial movement. These cascades are responsible for many extreme wicks in crypto markets.

Partial Liquidation: The Scalpel

Partial liquidation closes only the minimum amount necessary to bring the account back above the maintenance threshold. If your margin ratio has fallen 5% below requirement, the engine calculates how much to close to restore health, then closes exactly that amount — leaving the rest open.

Hyperliquid enabled partial liquidations based on direct user feedback. The process works as follows:

Margin check. The risk engine continuously monitors positions. When an account falls below threshold, it enters the liquidation queue.

Size calculation. The engine determines the minimum position reduction needed to restore margin above maintenance, plus a small buffer preventing immediate re-liquidation.

Partial close. Only the calculated portion is closed. The trader retains the remainder with a healthier margin ratio.

Continued monitoring. If the price keeps moving adversely, another partial liquidation occurs. This continues until price stabilizes, the trader adds margin, or the position is fully liquidated through successive partial closes.

Benefits for Individual Traders

Position preservation. If a well-researched long temporarily dips below threshold during a volatility spike, partial liquidation reduces exposure to survive the dip. If price recovers, you still participate. Under full liquidation, you are entirely stopped out. This matters enormously for moderate leverage — a 5x position can hit maintenance margin from just a 3-4% adverse move, and in volatile markets these moves frequently reverse.

Lower execution costs. Liquidating 20% of a position instead of 100% means proportionally less slippage. The smaller forced order also has less market impact, so the remaining 80% is not further damaged by the liquidation itself pushing price against the trader.

Time to react. After a partial liquidation, traders can respond — adding margin, manually reducing at a better price, or adjusting stop-losses. Under full liquidation, the position is gone before the notification arrives.

Benefits for the Market

The systemic advantages may matter even more than individual benefits.

Reduced cascade risk. Partial liquidations produce smaller forced orders with less market impact. Consider ten large positions approaching liquidation simultaneously during a downturn. Under full liquidation, the first triggers the second, creating a chain reaction. Under partial liquidation, only a fraction of each position closes. The smaller forced orders cause less price dislocation, and subsequent positions may never reach their threshold at all.

Better liquidity preservation. Order books have limited depth at each price level. Full liquidations eat through multiple levels, causing significant dislocations. Partial liquidations are more likely absorbed within near-spread liquidity, preserving order book structure during volatile periods.

Insurance fund sustainability. Full liquidations of large positions are the primary source of insurance fund drawdowns because their market impact pushes execution prices well below bankruptcy levels. Partial liquidations execute closer to fair value, reducing the burden on the fund.

Practical Implications for Traders

With partial liquidations, adjust your mental model:

Maintenance margin is not a cliff. Hitting it means a position reduction, not total loss. Being slightly above maintenance is less catastrophic than before — though still not comfortable.

Alerts become more valuable. A first partial liquidation is a warning shot giving you a window to adjust before further rounds. Setting margin alerts lets you capitalize on this opportunity.

Leverage discipline still matters. Partial liquidation is more forgiving, but multiple rounds still erode most of your margin through execution costs and adverse price movement. Appropriate position sizing and prudent leverage remain the best risk management.

Partial liquidation on Hyperliquid represents a meaningful improvement in risk management — protecting individual traders from the harshest consequences of temporary volatility and protecting the broader market from cascading forced liquidations. For a platform processing billions in daily volume, these improvements matter for everyone trading during high-volatility periods, not just those being liquidated.

Avoid Liquidation with HyperX

HyperX's risk warnings help you avoid liquidation in the first place. Our trader analysis shows risk metrics including leverage distribution and liquidation proximity, so you can evaluate traders before copying them.