Meaning and transaction use
Aswath Damodaran's NYU teaching note identifies default and reinvestment risk as central to selecting a risk-free asset. It explains currency consistency, matching the horizon or duration, and maintaining consistency between real or nominal cash flows and rates. These are methodological principles; the note's historical numeric examples are not current market quotations. [S1]
Proposed transaction method: include a rate-selection memo in the valuation file. Record the valuation date, quoted instrument or curve, maturity, currency and any adjustments. Give buyer and seller reviewers the same input trail so they can identify whether a valuation difference comes from the reference rate or another assumption.
Worked example
Illustrative sensitivity only. Assume one USD 10,000,000 payment in five years and flat discount rates of 4% and 5%. These are assumed rates, with no claim about present market yields or the credit quality of the payment.
Scroll the table horizontally to view all columns.
| Assumed rate | Calculation | Present value |
|---|---|---|
| 4% | 10,000,000 / 1.04^5 | USD 8,219,271 |
| 5% | 10,000,000 / 1.05^5 | USD 7,835,262 |
With the assumed payment unchanged, the higher rate reduces the calculated present value by approximately USD 384,009. A full valuation must also examine risk premiums, cash-flow assumptions and any effects of changing the currency or inflation basis.
Proposed transaction review process
Define the valuation basis
Record date, currency, nominal or real cash flows and forecast timing.
Select evidence
Capture the source instrument or curve and the rationale for its maturity and credit treatment.
Reconcile assumptions
Check the rate and premiums against the cash-flow basis and valuation method.
Test and disclose
Show rate sensitivity and explain material judgments in the valuation report.
Evidence checklist
Dated market evidence
The actual curve or security data used, with observation date and retrieval record.
Cash-flow specification
Forecast currency, inflation assumptions and timing of each modeled payment.
Methodology memo
Selected horizon, any interpolation and the treatment of sovereign credit risk.
Reviewer reconciliation
Buyer and seller assumptions compared on a common date and currency basis.
Decision framework
| Situation | Proposed action |
|---|---|
| Cash-flow currency changes | Rebuild the consistency check for both cash flows and rate inputs. |
| The quoted security has credit risk | Document the methodological treatment and obtain appropriate valuation review. |
| Parties disagree on value | Reconcile the rate date, cash-flow currency and risk-premium assumptions before attributing the difference to negotiation. |
| Rates move after the valuation date | Record the date boundary and assess whether a separate updated valuation is required. |
Common errors to check
- Selecting a rate only from the company's place of incorporation.
- Combining nominal cash flows with an unexplained real rate.
- Using an undated quotation or presenting an illustrative rate as a current yield.
- Describing a risky company's cost of capital as simply the risk-free rate.
Make the valuation inputs reviewable
Share the valuation date, cash-flow currency, model and rate-source memo when discussing a valuation requirement.
Discuss the transactionPrimary references and editorial scope
- Aswath Damodaran, NYU Stern: Estimating Risk-free Rates
Default and reinvestment risk; currency, horizon and real/nominal consistency. Reference checked 17 September 2026.
Methodological explanation with an assumed sensitivity. No current market rate or completed valuation is provided. The checklist and decision framework are proposed editorial review tools.
General business information. Obtain advice appropriate to the legal, tax, accounting and financing facts. No offer, lender commitment or transaction outcome is represented. All worked examples use expressly assumed figures. Editorial draft date: 17 September 2026.
