1. The handling fee is relatively reasonable: the handling fee for futures trading is reasonably priced and will be determined according to market competition and exchange regulations. 40 yuan's handling fee is within a reasonable range, which is not high compared with other futures products.

2. Transaction cost: As a common futures product, rebar has high transaction activity and good liquidity. Compared with the futures with low liquidity, the transaction cost of rebar is lower and the handling fee is relatively lower.

3. Great volatility: Rebar, as a commodity futures, has great price fluctuation. If the market fluctuates greatly, investors can offset the cost of handling fees through the profits they get, making the handling fees relatively low.