On the US securities account page of the FUTU US broker, click on "up" icon on the right of the cash, or the "Cash Sweep" icon, and you can enter the Cash Sweep program introduction page and participate in program by confirming your joining.
On the Cash Sweep page, close the switch button to exit the Cash Sweep program. The idle cash deposited in the bank(s) and accrued interest will be returned to the U.S. securities account within 2 trading days.
The interest of the Cash Sweep program is calculated daily and paid monthly, and will generally be paid to the swept account at the end of the month. You can use filter to see all the records of program in the securities account "fund details".
Participating in the Cash Sweep program, the funds deposited in the bank will still be considered as the purchasing power of the securities account. When the cash purchasing power of the securities account is negative, the idle cash will be automatically redeemed from the bank(s) to the securities account before the transactions are settled to avoid the payment of finnacing interest. When the cash is positive, it will be automatically deposited in the bank(s) at 14:00 on each trading day to earn interest.