Converting Between Different Quotation Swap Bases in Excel

A bond is a type of debt instrument that pays a fixed or variable interest rate to the bondholder until maturity, when the principal amount is repaid. Bonds are issued by governments, corporations, and other entities to raise funds for various purposes.

The price of a bond is the present value of its future cash flows, discounted by an appropriate interest rate. The interest rate used to discount the cash flows is also known as the yield or the required rate of return on the bond. The yield reflects the risk and opportunity cost of investing in the bond.

Different bonds have different levels of risk, depending on the creditworthiness of the issuer, the maturity of the bond, the features of the bond, and the market conditions. Generally, bonds with higher risk have higher yields, and bonds with lower risk have lower yields.

One way to measure the risk of a bond is to compare its yield with the yield of a similar bond that is considered risk-free or very low-risk. The most common benchmark for risk-free bonds is the U.S. Treasury bond, which is backed by the full faith and credit of the U.S. government. The difference between the yield of a bond and the yield of a comparable U.S. Treasury bond is called the spread or the credit spread. The spread represents the additional compensation that investors demand for holding a riskier bond instead of a risk-free bond.

For example, if a 10-year corporate bond has a yield of 4% and a 10-year U.S. Treasury bond has a yield of 2%, the spread is 2% or 200 basis points (bps). This means that investors require a 2% higher return for investing in the corporate bond than in the U.S. Treasury bond.

The spread can also be expressed as a percentage of the yield of the U.S. Treasury bond. For example, if the yield of the 10-year U.S. Treasury bond is 2%, the spread of 2% is equivalent to 100% of the U.S. Treasury yield. This means that the corporate bond yield is twice as high as the U.S. Treasury yield.

The spread can vary over time, depending on the supply and demand of the bonds, the changes in the credit quality of the issuers, the changes in the interest rates and inflation expectations, and the changes in the market sentiment and risk appetite. Generally, when the economy is doing well and investors are confident, the spread tends to narrow, as investors are willing to take more risk for lower returns. When the economy is doing poorly and investors are fearful, the spread tends to widen, as investors demand higher returns for taking more risk.

The spread can also vary across different types of bonds, depending on their characteristics and features. For example, bonds with longer maturities tend to have higher spreads than bonds with shorter maturities, as they are more sensitive to interest rate changes and inflation risks. Bonds with lower credit ratings tend to have higher spreads than bonds with higher credit ratings, as they are more likely to default or miss payments. Bonds with special features, such as call options, put options, or convertibility, tend to have lower spreads than bonds without such features, as they offer more flexibility and value to the bondholders.

The spread is an important indicator of the relative value and attractiveness of a bond. Investors can use the spread to compare the returns and risks of different bonds, and to identify potential opportunities and risks in the bond market. A bond with a high spread may offer a high return, but it may also entail a high risk. A bond with a low spread may offer a low return, but it may also entail a low risk. Investors need to balance the trade-off between return and risk, and to consider their own preferences, objectives, and constraints, when choosing which bonds to invest in.

Basic Theory:

Interest rate swaps involve the exchange of cash flows based on different interest rates. The two common quoting conventions for interest rate swaps are the Fixed-Floating (e.g., 1.50% vs. 6M Libor) and the Floating-Floating (e.g., 3M Libor vs. 6M Libor) bases. Converting between these bases is essential for comparing and valuing different swap contracts.

Procedures for Converting Quotation Swap Bases:

  1. Identify the existing and desired bases.
  2. Determine the appropriate conversion factor.
  3. Apply the conversion factor to the relevant interest rates.

Scenario:

Consider a scenario where you have a Fixed-Floating interest rate swap quoted as 2.00% vs. 3M Libor, and you want to convert it to a Floating-Floating basis quoted as 3M Libor vs. 6M Libor.

Conversion Factor Calculation:

To convert from Fixed-Floating to Floating-Floating, you need to account for the difference in tenors. In this case, the conversion factor is calculated as follows:

Conversion Factor = (Desired Floating Tenor) / (Existing Floating Tenor)

Conversion Factor = 6 / 3 = 2

Apply the Conversion Factor:

Now, apply the conversion factor to the existing interest rates:

  • Existing Fixed Rate: 2.00%
  • Existing Floating Rate (3M Libor): Assume it is currently at 1.50%

Converted Fixed Rate = Existing Fixed Rate

Converted Floating Rate (6M Libor) = Existing Floating Rate (3M Libor) * Conversion Factor

Converted Floating Rate (6M Libor) = 1.50% * 2 = 3.00%

Excel Calculation:

Create an Excel table to perform the calculations:

Description Rate (%)
Existing Fixed Rate 2.00
Existing Floating Rate (3M) 1.50
Conversion Factor 2
Converted Fixed Rate =B2
Converted Floating Rate (6M) =B3*$D$2

Where D2 contains the Conversion Factor.

Result:

The converted interest rates are:

  • Converted Fixed Rate: 2.00%
  • Converted Floating Rate (6M Libor): 3.00%

Other Approaches:

Alternative approaches may include using specialized financial functions in Excel, such as the RATE function, to directly calculate the converted rate. Additionally, financial modeling tools and software may offer built-in functions for quotation base conversions, streamlining the process further.

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