Foresight News: HashKey Global has launched perpetual contracts for Cardano (ADA), NEAR Protocol (NEAR), and Arkham (ARKM). The underlying assets for the new contracts are ADA/USDT, NEAR/USDT, and ARKM/USDT indices, all settled in USDT, with a maximum leverage of 10 times, and a funding fee cap of +0.75%/-0.75%, settled every 8 hours.