Which company's valuation is more exposed to interest rate risk, a company which owns a series of rooftop solar installations such as SunNova or SunRun or an E&P company which owns a bunch of oil and gas wells.

Question

BlackTom AI · Accepted Answer

Long-duration, predictable cash flows are far more sensitive to changes in interest rates because the present value of distant receipts is heavily affected by the discount rate.

1) Relevant concepts
- Present value (PV) and discounting: PV of a cash flow CF at time t is CF/(1+r)^t; higher r reduces PV.
- Duration: the weighted average time of cash flows; longer duration → greater sensitivity to r.
- Business cash-flow profiles: rooftop-solar firms (leases/PPAs) generate long, stable contract or lease payments; E&P firms generate front-loaded, declining production with cash flows that depend primarily on volatile commodity prices.

2) Step-by-step reasoning
- Interest-rate risk for valuation is driven by how much of value is in long-term cash flows. Solar companies recover large upfront capital over many years via fixed payments → high duration.
- E&P firms typically realize more value earlier (initial production) and face commodity-price volatility that dominates valuation; their effective duration is shorter.

3) Calculations (illustrative)
- PV of a level $100 annual cash flow for 20 years at r = 5%: PV20 = 100*(1 − 1.05^−20)/0.05 = 100*12.462 = $1,246.20.
- If r rises to 6%: PV20_6% = 100*(1 − 1.06^−20)/0.06 = 100*11.4717 = $1,147.17.
- Absolute drop = $99.03, relative drop ≈ 7.94%.
- For a 5-year stream: PV5@5% = 100*(1 − 1.05^−5)/0.05 = 100*4.3295 = $432.95; PV5@6% = $421.24; drop = $11.71, relative ≈ 2.71%.
- The longer (20-year) stream is much more sensitive to the same rate increase.

4) Why the correct answer is correct
Because rooftop-solar companies’ value is concentrated in long-term, contract-like cash flows (high duration), an increase in interest rates materially reduces their present value more than it does for an E&P firm whose cash flows are shorter-dated and dominated by commodity-price volatility.

5) Why the other option is incorrect
Labeling the E&P company as more exposed ignores that its valuation is often driven by near-term production and commodity prices; those factors and shorter cash-flow duration make it less sensitive to pure interest-rate changes.

Conclusion: The Solar Company is more exposed to interest-rate risk (matches the provided answer: Solar Company).

Which company's valuation is more exposed to interest rate risk, a company which owns a series of rooftop solar installations such as SunNova or SunRun or an E&P company which owns a bunch of oil and gas wells. Single choice

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