Hyperliquid delisted JELLYJELLY perpetual futures after a trader executed a sophisticated market manipulation scheme, causing approximately $12 million in unrealized losses to the exchange's Hyperliquidity Provider (HLP) vault. The incident involved a $6 million short position and artificial price pumping, prompting network validators to remove the contract. Most users will be reimbursed by the Hyper Foundation, while the exchange plans technical improvements to prevent future manipulation.