The futures trading mechanism is T+0, which means that you can buy and sell on the same day, but not necessarily on the same day. Investors can decide whether to open or close positions on the same day or hold positions overnight according to their own circumstances. For some futures products, the closing fee will increase on the same day.

As for how long the position can be held, it depends on the delivery date of the contract. If the customer holds the rebar 1805 contract, it will be more than two months before the delivery date. If investors decide to hold positions, they can hold them for more than two months until April 30 to decide whether to enter the delivery month. Ordinary retail investors can't enter the delivery month. If the legal person has the intention of spot delivery, it may consider entering the delivery month, but the margin ratio will be increased.

Futures are relatively risky, because its trading mechanism is margin trading, which is equivalent to adding leverage to incite large funds with small funds. At the same time, futures can not be held for a long time like stocks. Investors can't let go of their accounts just because they are quilt cover. When the available funds are below zero, there is a risk of being forced to close the position. Finally, futures prices fluctuate frequently and relatively violently and rapidly. Investors may find it relatively difficult to grasp, but if they control their positions and strictly control their trading strategies, the risks can also be properly controlled, and they can communicate with their futures account managers more.