Interest on negative credit card balances
This is equal to the value of a loan multiplied by the interest rate. The interest rate is 10%. Negative credit card balances are 20% of the average amount paid via credit card.
When there is negative credit card balance, it means customer has overpaid the credit limit. And banks usually dont charge interest rate if we overpay. I am unable to understand the 10% interest rate and 20% of average amount paid. How did we arrive at those percentages ?