Fixed Income
Fixed income refers to any type of investment under which the borrower or issuer is obligated to make payments of a fixed amount on a fixed schedule
There is a large variety of types and complexity in fixed-income products tradable in fixed-income market.
The fixed-income market, also known as debt securities market or bond market, consists mainly of bond securities issued by the federal government, corporate bonds, municipal bonds, and mortgage debt instruments.
source: Fixed Income Markets