[Huobi HTX Has Launched AMD, USAR, BILL, IO Perpetual Contracts] According to Deep Tide TechFlow news on May 7, and as per the official announcement, Huobi HTX has launched AMD/USDT, USAR/USDT, BILL/USDT, and IO/USDT perpetual contracts on May 7. Among them, AMD/USDT and USAR/USDT have a maximum leverage of 10x, while BILL/USDT and IO/USDT have a maximum leverage of 20x.