Which of the following is NOT a type of interest rate mentioned?

The choice indicated as the answer pertains to the types of interest rates that are commonly referenced in financial discussions. Savings bonds, money market rates, and bank rates are all established financial instruments or products that readily denote specific forms of interest rates offered by financial institutions or government entities.

Savings bonds typically refer to government-issued securities where the interest rate is fixed and provides a return to the bondholder at maturity. Money market rates describe the interest rates related to short-term borrowing and lending in the money market, where participants can buy and sell financial instruments.

Bank rates refer generally to the interest rates set by central banks, reflecting the costs associated with borrowing as well as influencing other types of financial products offered by banks.

In contrast, credit card rates, while certainly prevalent in discussions on personal finance, do not fit the same mold as traditional interest rates. They refer to the interest charged on balances carried over from month to month on a credit card, and while it represents a form of interest, it is a specific application rather than a generic classification of interest rate types like the others listed. Therefore, identifying credit card rates as not fitting the classic definitions of interest rate types makes it the correct answer in this context.