Papertrade is facing an allegation that a trader used Hyperliquid price moves to profit from its house liquidity pool. The claim surfaced on Oct. 10, when pseudonymous observer El33 pointed to a wallet ending in 840e. The venue’s public data at the time showed about $3.14 million in the pool and no queued payout debt.
How the Alleged Strategy Worked
El33 said the trader opened large ETH shorts on Papertrade, sold ETH on Hyperliquid to push the midpoint price down by roughly 10 basis points, then closed the Papertrade positions for a gain. PaperDash’s view of the cited wallet showed about $1.73 million in realized trading gains. That number is notable, but it does not prove the gains came from manipulation. The observer also described a second leg: the trader switches from shorts to longs on Papertrade and then unwinds the Hyperliquid position. “Seems like someone currently draining Papertrade LP by Oracle manipulation,” El33 wrote. The claim is still an allegation, and no established loss figure has been published.
Marcin Kazmierczak, co-founder of oracle provider RedStone, shared the post and called it an “Interesting Oracle manipulation strategy on Papertrade during weekends.” He did not offer a separate transaction analysis.
Where the Risk Sits
Papertrade settles synthetic BTC and ETH positions against its own liquidity pool. According to DefiLlama’s protocol description, it uses Hyperliquid’s best-bid-and-offer midpoint, the price halfway between the highest buy order and lowest sell order. If the pool cannot cover a winning trader’s profit, that profit enters a queue instead of becoming immediately available. The risk therefore falls on the pool that pays winners, not on a central order book.
Papertrade’s public protocol summary reported a positive pool balance and zero queued profits. PaperDash also displayed a $3.14 million LP balance and an empty payout queue. Those readings do not show that winning traders were waiting for payments at that snapshot. The house reserve is also distinct from customer deposits. As The Defiant previously reported, the $137.1 million in combined launch-day TVL included both trader balances and house liquidity. It was not all available to pay winners.
Admin Controls and Open Questions
Papertrade administrator @izebel_eth explained that only user losses enter the pool, not their collateral. When a winning trade closes while a queue exists, the original collateral becomes available again, but “only the profits are queued.” The team’s published launch controls let administrators pause new positions, freeze markets, change fee and impact parameters, and adjust opening headroom. Under those rules, existing positions in a frozen market can still close against the paused bid-offer midpoint.
For now, the numbers are public but the conclusion is not. The $3.14 million pool and the $1.73 million wallet gain draw attention. They do not, on their own, settle whether the trades were normal hedging, aggressive arbitrage, or something the observer would call manipulation.
