Perpetual futures
To hold Futures Trading indefinitely, it is necessary to regularly roll over and enter into new contracts before the expiration. However, due to the difference between the futures price and the spot price, repeatedly rolling over can increase basis risk and be inefficient for hedging or speculation 4. To improve this situation, the Hong Kong-based China Gold and Silver Exchange developed a "perpetual futures" market where futures contracts automatically roll over daily and the price difference between futures and spot is settled between trading parties Perpetual Inverse Swap Perpetual futures - Wikipedia.