There are various interest rates, such as deposit interest rate, loan interest rate and so on.

You don't need to know what kind of interest rate it is. Whether interest rates fall or rise, all interest rates will always fluctuate in the same direction.

How does the national debt fund fluctuate? Because they speculate on bonds, not the bonds originally issued, and then hold them until maturity.

They will trade in the secondary market, and there will be price fluctuations when trading.

Usually, when the interest rate falls, the bond index will rise, and when the interest rate rises, the bond market will be bad.

Therefore, interest rate adjustment will have an impact on bond prices.

It's just that bonds are not as volatile as the stock market.

The original answer is not plagiarism. Hope to give points.