This week the basic passive rate dropped to 5.10%, according to data published by the Central Bank.
Such low figures have not been seen since 2008, when the indicator reached 4.25%
The downgrade this week was due to a fall in interest paid by public banks and mutual benefits for all periods.
The basic rate is used by banks to calculate the contributions of long-term loans in local currency. It also serves as a reference for the payment of investment coupons.
At the current level, the indicator is 85 points below the level at which it started the year.