As long as the account password is known, the stepwife can withdraw the futures amount after her husband's death. The futures account also belongs to the customer's legacy, which is theoretically inherited by its heirs. As long as the heir knows the account password, he can close the position and transfer the money in the futures account. As long as you know the account password and log in, you can take the money to the customer's bank card. If the position is uneven at maturity, it will be forced to close the position by the exchange and the principal will be returned to the account.