1. Liquidity: refers to the ability to realize assets smoothly at a reasonable price. It is the relationship between the time scale of investment (how long it takes to sell) and the price scale (discount relative to the fair market price). Futures and stocks are more liquid than real estate.

2. The liquidity of futures contracts depends on the trading volume. The contract in the month with the largest turnover (called "main contract") can be realized in a short time, so it is said that liquidity is good. On the contrary, a monthly contract with a small volume, whether it is opening or closing, is not so easy, so it is called poor liquidity.

3. Contracts with good liquidity tend to be more continuous.

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Friendly reminder: unless you do futures arbitrage, please try not to participate in contracts with small trading volume.