Fixed income is a useful class of investments for investors of all types, ranging from individual traders to institutional investors. The nature of fixed income securities provides investors with a consistent income stream with a lower level of risk when compared to other asset classes. Because the income is fixed, investors are typically able to predict future cash flows, which can be beneficial for planning purposes.

Fixed income is a type of financial security, such as a bond or debenture, which pays regular (fixed rate) interest payments until maturity, when the loan is repaid. The interest received can come from a number of sources, such as a fixed or variable interest rate or a premium. The repayment of the loan is typically predetermined, providing an additional layer of protection to the investor.

It is a risk-controlled way of earning passive income and can be an attractive option for those looking to diversify their investments while also generating a steady income. For instance, some common fixed income products and strategies involve buying a bond, investing in a bond fund, dividend investing, peer-to-peer lending, investing in government bonds, investing in corporate bonds, investing in mortgage-backed securities, as well as investing in high-yield bonds.

For those who are risk averse, fixed income investments can be a great way to earn a steady income while managing their risk. Because many bonds, especially government bonds, have relatively low rates of default, investors can be confident that the principal will be returned when the bond matures. Fixed income products can also provide a way to protect against inflation, as many bonds offer inflation-protection features.

In addition to government bonds, corporate bonds and mortgage-backed securities, there are also hybrid fixed income securities or floating rate notes, which combine fixed and floating rate features. These securities can be helpful for those who are looking to start investing in fixed income but want the opportunity to benefit from market fluctuations.

Overall, fixed income investments can provide investors with a steady, predictable form of passive income. However, investors should always be aware of the risks involved before making a fixed-income investment, as the value of the investment can fluctuate depending on economic, financial and market conditions. It is important to research any fixed income product before making an investment and to work with a financial adviser to ensure that any investments are consistent with an individual's goals and risk tolerance.