fixed interest rate securities

基本解释

In general, securities firms and banks to investors to provide this service will charge a fixed interest rate.
一般来说，证券公司和银行向投资者提供这种服务将收取固定利率。

Funds that invest in fixed income municipal securities are not guaranteed and are subject to interest rate, inflation, and credit risks.
FORBES: Muni Bond Manager's Journal: Looking For Real Value
Keep in mind that municipal securities are subject to a number of risks including, but not limited to: Interest Rate Risk, the risk that the market value of fixed-income securities may fluctuate when interest rates change, and Prepayment Risk, the risk that the issuers of individual securities may prepay them at a time when interest rates have declined.
FORBES: Put Intermediate Muni Funds In Your Portfolio's Rotation