| Course | GB550 Financial Management |
|---|---|
| Unit | Unit 3 |
| Paper type | Bond valuation |
| Length | About 860 words, 6 pages double-spaced |
| Format | APA 7 student paper |
| School | Purdue University Global |
| Program | MBA |
| Updated | October 2026 |
Free sample paper for GB550 Unit 3
What the Barge Line's Debt Is Worth: A Unit 3 Bond Valuation of Unsecured and Secured Notes
[Student Name]
Purdue University Global
GB550: Financial Management
Unit 3 Bond Valuation
[Instructor Name]
[Date]
The barge operator, its notes and every price and yield are composite and illustrative; the methods and sources cited are real.
Part 1: Pricing the Unsecured Notes
Inputs. Face value $1,000; coupon 6.125 percent paid semiannually, $30.625 every six months; eight years to maturity, 16 periods; market yield 7.05 percent, 3.525 percent per period.
Formula. Price = C × [1 − (1 + i)^−n] / i + F / (1 + i)^n.
Coupons. 30.625 × [1 − 1.03525^−16] / 0.03525 = $369.69.
Principal. 1,000 / 1.03525^16 = $574.48.
Price. $944.17, or 94.42 percent of face. The 6.125 percent coupon was set when rates were lower, so the notes sell below face until they mature.
Current yield. Annual coupons of $61.25 divided by $944.17 = 6.49 percent, below the 7.05 percent yield to maturity because the current yield ignores the gain from the discount as the notes approach maturity.
Spreadsheet. PV(3.525%, 16, −30.625, −1000).
Part 2: What the Yield Says About Credit
The 7.05 percent yield can be read as a Treasury yield of about 4.35 percent for a similar maturity plus a credit spread of 270 basis points. That spread is what investors charge for the chance that the operator cannot pay. It is consistent with the Unit 1 figures: interest covered 3.47 times and debt at 2.68 times EBITDA place the company in the lower investment-grade or upper speculative-grade range, where spreads of that size are common. Koller et al. (2020) note that spreads reflect both default risk and liquidity, and notes from a mid-sized issuer trade less often than large issues, which adds a little to the spread.
A 270-basis-point spread is the market's own summary of the company's coverage and debt load, expressed as a price.
Bond prices for a real issuer would come from trade data published by FINRA or from a library database; these figures are illustrative.
Part 3: Interest Rate Risk
Rates up one point, to 8.05 percent. Price falls to $888.05, a drop of 5.94 percent.
Rates down one point, to 6.05 percent. Price rises to $1,004.70, a gain of 6.41 percent.
Modified duration. Macaulay duration is 6.39 years, and dividing by 1.03525 gives a modified duration of 6.17, which predicts a change of about 6.17 percent for a one-point move in either direction.
The actual changes straddle the estimate: the price rises more than duration predicts and falls less. That asymmetry is convexity, and it means duration slightly overstates losses and understates gains for large moves. Brealey et al. (2023) describe duration as a first approximation that works best for small rate changes, and the repricing here shows its limits at a full point.
Part 3b: A Wider Spread Instead of Higher Rates
Interest rate risk is not the only way the notes' value can change. If a drought year pushed coverage down and debt toward the covenant, investors might demand a wider credit spread even with Treasury yields unchanged. A 100-basis-point widening has the same arithmetic effect as a one-point rise in rates: the price falls to $888.05, and the market value of the $250.0 million issue drops from about $236.0 million to about $222.0 million. The company would not pay that loss in cash, since the coupon is fixed, but any new unsecured borrowing would cost about 8.05 percent rather than 7.05. That is why the financing choices in Units 9 and 10 pay close attention to coverage in a low-water year: the cost of the next loan depends on how the last bad year looked to lenders.
Part 4: The Secured Equipment Notes
Inputs. Price 99.10 percent of face, $991.00; coupon 5.40 percent paid semiannually, $27.00; five years to maturity, 10 periods.
Solution. Solving 991.00 = 27.00 × [1 − (1 + i)^−10] / i + 1,000 / (1 + i)^10 gives i = 2.805 percent per period, a yield to maturity of 5.61 percent.
Spreadsheet. RATE(10, 27, −991, 1000) × 2.
Comparison. With a five-year Treasury near 4.20 percent, the secured notes carry a spread of about 141 basis points, against 270 for the unsecured notes, a gap of 129 basis points. Most of the gap reflects the barges pledged as collateral: barges hold resale value, so lenders with a claim on specific vessels expect to recover more in a default. The shorter maturity also contributes, since five years of credit risk is less than eight.
What Carries Forward
Market value of unsecured notes: $250.0 million face at 94.42 percent, about $236.0 million.
Market value of secured notes: $110.0 million face at 99.10 percent, about $109.0 million.
Yields for the cost of debt: 7.05 percent unsecured, 5.61 percent secured.
Unit 6 uses these market values and yields to weight the cost of debt. Brigham and Ehrhardt (2020) stress that the cost of debt for capital budgeting is the yield on new borrowing, not the coupon on old debt, which is why the 7.05 percent yield, not the 6.125 percent coupon, carries forward.
References
Brealey, R. A., Myers, S. C., & Allen, F. (2023). Principles of corporate finance (14th ed.). McGraw Hill.
Brigham, E. F., & Ehrhardt, M. C. (2020). Financial management: Theory and practice (16th ed.). Cengage.
Koller, T., Goedhart, M., & Wessels, D. (2020). Valuation: Measuring and managing the value of companies (7th ed.). Wiley.
Reading the GB 550 Unit 3 instructions
In GB550 Unit 3 you value a company's bonds and assess their risk. Price at least one issue from its coupon, maturity and market yield, showing coupon and principal values separately, and calculate the current yield. Break the yield into a Treasury rate and a credit spread, and connect the spread to the company's financial ratios. Measure interest rate risk by repricing at higher and lower yields and with duration, and explain any difference. Solve for the yield on a second issue from its price, and explain why the two yields differ. Record the market values and yields later units will use. Four parts across roughly five pages is typical, with finance texts cited in APA 7.
Inside the GB550 Unit 3 example
Part one prices the unsecured notes: coupons worth $369.69 and principal worth $574.48 give $944.17, with the spreadsheet function shown. Part two reads the spread against coverage of 3.47 times and debt at 2.68 times EBITDA, and the highlighted sentence calls the spread the market's summary of both; Koller and colleagues add liquidity. Part three reprices at 8.05 and 6.05 percent and explains convexity with Brealey and colleagues, then shows what a 100-point spread widening would do. Part four solves the secured notes' 5.61 percent yield and splits the 129-point gap between collateral and maturity. Brigham and Ehrhardt support carrying yields, not coupons.
Reading the GB550 Unit 3 grading rubric
Instructors grading a GB550 bond valuation look for a price built from visible coupon and principal values and a yield explained, not just reported. Showing both components earns points. Distinguishing current yield from yield to maturity shows understanding. Linking the credit spread to the company's ratios shows integration with earlier work. Repricing at two yields and comparing with duration shows the risk measure was tested. Explaining convexity shows depth. Solving a second issue's yield and accounting for the gap shows analytical care. Recording market values for the cost of capital shows foresight. The bond chapters of the Brealey and Brigham texts and Koller's valuation book are cited.
Common GB550 Unit 3 mistakes, and how to avoid them
Many GB550 Unit 3 papers price a bond correctly and stop, without asking what its yield says about the issuer. Others report duration without checking it against an actual repricing, so its limits stay hidden. A frequent gap is the comparison: two issues from one company yield different amounts for reasons, such as collateral and maturity, that the paper should separate. Some writers carry the coupon rate forward as the cost of debt, which understates it when rates have risen. Price the bond with both components, explain the spread, reprice and compare with duration, solve the second yield, explain the gap and record market values. Real bond prices come from FINRA trade data.
Get a GB550 Unit 3 example written to your instructions
Which issuer did your section assign, or which did you choose? Send its bond terms, a recent price or yield, the Unit 3 prompt and the rubric. Every issue gets priced from its two cash flow streams, the yield split into benchmark and spread, and the rate risk measured both ways. That first custom sample is free, usually back in 24-48h. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
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GB550 Unit 3 questions, answered
Where do bond prices for a real issuer come from?
FINRA publishes trade data for most corporate bonds through its public market data pages, and library databases often carry the same prices with longer history. The sample's issuer is composite, so its prices are illustrative. For your company, the custom version uses a dated price from a source your section accepts and cites it beside the calculation.
Why are secured notes cheaper than unsecured ones?
Because lenders holding a claim on specific assets expect to recover more if the borrower defaults, so they accept a lower yield. Barges hold resale value, which makes them useful collateral. The sample credits most of the 129-basis-point gap between the two spreads to that security and notes that the shorter maturity of the secured notes contributes as well.
Does the course expect duration?
Not always. Some sections stop at pricing and yield to maturity; others ask for a measure of interest rate risk, and duration is the usual one. The sample reports modified duration and then reprices the notes at higher and lower yields so the estimate can be checked. If your prompt does not mention duration, the repricing alone answers the risk question.
Where can I find a free GB550 Unit 3 sample paper?
This page carries a full GB550 Unit 3 bond valuation of a composite barge operator's unsecured and secured notes, with pricing, spreads, duration and APA 7 references.
Why does the price change differ from the duration estimate?
Because of convexity. The notes rise 6.41 percent when rates fall a point and drop 5.94 percent when they rise, around duration's 6.17 percent estimate, so duration overstates losses and understates gains for large moves.