Papertrade’s house liquidity pool faces an allegation that a trader is extracting profits by moving the Hyperliquid price used to settle its trades. The venue’s public data showed about $3.14 million in the pool and no queued payout debt as observers flagged the strategy on Oct. 10.
Pseudonymous observer El33 alleged that a trader opened large $ETH shorts on Papertrade, sold $ETH on Hyperliquid to depress its midpoint price by roughly 10 basis points, then closed the Papertrade positions for a profit. PaperDash’s view of the cited wallet showed about $1.73 million in realized trading gains. That figure does not establish that the gains resulted from manipulation.
The risk falls on the pool that pays winning traders. Papertrade settles synthetic BTC and $ETH positions against its own liquidity pool using Hyperliquid’s best-bid-and-offer midpoint—the price halfway between the highest buy order and lowest sell order—according to DefiLlama’s protocol description. If that pool cannot cover a winner’s profit, the profit enters a queue rather than becoming immediately available.
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