Prepayment Risk and Single Monthly Mortality (SMM) Prepayment risk and Single Monthly Mortality (SMM) are essential concepts that determine the risk and retu...
Prepayment risk and Single Monthly Mortality (SMM) are essential concepts that determine the risk and return of fixed income securities like bonds.
Prepayment risk:
Bonds are typically sold with the promise of receiving a fixed amount of money (principal) back at maturity.
However, this payment might not be received on the maturity date due to various reasons, such as issuer default or borrower insolvency.
This risk can significantly affect the value of the bond and its return.
SMM:
SMM is a measure that reflects the potential risk associated with buying a bond.
It is calculated as the maximum loss an investor can experience over the life of the bond.
SMM is used by investors to compare different bonds with varying maturities and credit ratings.
SMM = Maximum potential loss/Value of the bond
Important factors affecting SMM:
Credit rating: Bonds issued by highly rated issuers generally have lower SMM compared to those issued by less reputable issuers.
Maturity: Bonds with longer maturities have higher SMM as they are exposed to more potential for default.
Interest rate: Higher interest rates increase the value of bonds due to increased future interest payments. However, higher interest rates also increase the risk of default.
Credit spread: A credit spread refers to the difference between the interest rate of a bond and the risk-free rate (e.g., government bond). A wider credit spread implies a higher potential for default, resulting in a higher SMM.
SMM and Investment Strategies:
Investors can use SMM to construct diversified portfolios by purchasing bonds with varying maturities and credit spreads.
This approach can help mitigate the risk of default and achieve desired returns.
However, SMM should not be the sole factor guiding investment decisions, and other factors like creditworthiness, liquidity, and return potential should also be considered