What triggered Hyperliquid HLP losses?

TLDR

Hyperliquids HLP loss was triggered by a coordinated manipulation of the POPCAT market that created a buy wall, lured in liquidity, then pulled bids to force liquidations, leaving HLP with bad debt (CoinDesk).

1. An attacker split $3M USDC across 19 wallets, built $2030M of POPCAT longs, then removed a ~$20M buy wall, crashing price and triggering liquidations (Cointelegraph).
2. The attackers collateral was wiped, but HLP absorbed the remaining positions and lost about $4.9$5.0M (The Defiant).
3. Hyperliquid temporarily paused its bridge via an emergency lock while manually closing exposure, then resumed activity after checks (The Block).

Deep Dive

1. Orchestrated Buy Wall Then Pull

The sequence began with $3M USDC withdrawn from OKX, split into 19 wallets and deployed to open over $26M in POPCAT longs, then a ~$20M bid wall near $0.21 was placed and removed.

1. The large buy wall created the illusion of demand, drawing in copycat longs and pushing price up before support vanished (Cointelegraph).
2. When the wall disappeared, price support evaporated and thin depth amplified the drop, setting up a liquidation cascade (CoinDesk).

2. Liquidation Cascade Hits HLP

As longs were liquidated, HLP, which backstops bad debt from the liquidation engine, inherited positions and crystallized roughly $4.9M in losses, while the attackers $3M was sacrificed.

1. Reports converge on HLP losing about $4.9$5.0M after absorbing positions and closing them at worse prices (The Defiant).
2. Commentary framed it as peak degen warfare, exploiting thin depth and automated LP absorption rather than a protocol exploit (CoinDesk).

3. Operational Safeguards and Context

Hyperliquid invoked an emergency lock on its Arbitrum bridge and manually closed the position, then resumed activity after checks; media noted similarity to a March incident.

1. The platform paused deposits and withdrawals via emergency lock, then reopened after investigation, indicating a risk control response rather than a chain exploit (The Block).
2. Outlets highlighted this as at least the third manipulation-style hit in 2025, underscoring structural risk in high-leverage markets on low-liquidity tokens (NewsBTC).

Conclusion

The HLP losses were not from a protocol hack but from manufactured demand followed by a rapid withdrawal of support that triggered liquidations. The mechanism exploited thin-depth, high-leverage dynamics on a memecoin, leaving HLP to socialize bad debt. Until listing and leverage policies adapt for illiquid assets, similar attacks could recur, and HLP returns will remain exposed to these tail events.