Average daily deposit balance is calculated by dividing the sum of the daily account deposit balances by the number of calendar days in the respective month.

Example:
Assuming the customer newly opened a Preferred Banking account and deposited $80,000 in July 2021, and with the following deposit balance and transactions in August 2021 (i.e. the Bonus Interest Entitlement Period)

HKD deposit balance from 1 – 7 August 2021:	$80,000	7 days
Funds out on 8 August 2021:	-$40,000
HKD deposit balance from 8 – 21 August 2021:	$40,000	14 days
Funds in on 22 August 2021:	+$30,000
HKD deposit balance from 22 – 31 August 2021:	$70,000	10 days
Average daily deposit balance in August 2021:	$58,710

Calculation of average daily deposit balance