Temporary Earnings-Loss Valuation Test
Value a crisis by isolating temporary earnings loss from enduring cash flows
- Difficulty
- Moderate
- Time to result
- ~days to results
- Steps
- 6
- Confidence
- 94%
Treat a stock as a long-duration claim rather than valuing it solely on the next twelve months. First, impose a deliberately severe earnings loss during the disruption, potentially taking one year of earnings to zero. Then specify when earnings normalize and at what sustainable level. Feed those assumptions into a valuation model and calculate how much value the missing period actually removes. Compare that impairment with the observed market decline. A much larger decline may represent fear, risk-premium expansion, or doubts about recovery rather than the mechanical loss of one year's profit. The method does not declare every crash a bargain: investors must stress-test delayed recovery, permanent margin damage, dilution, debt pressure, and business failure before acting.
Origin
Jeremy Siegel applied long-duration equity valuation during the March 2020 crash to test whether the market decline was proportionate to even an extreme one-year earnings collapse.
Core principles
- 01Stocks represent long-duration cash flows
- 02A temporary earnings loss is not a total business loss
- 03Normalized post-crisis earnings anchor valuation
- 04Fear can push prices below model-implied values
- 05Recovery assumptions must be stated explicitly
How to run it
- 1
Define the asset horizon
Recognize that equity value reflects cash flows extending far beyond the current year.
Pro tip Use a long-horizon discounted-cash-flow or normalized-earnings model.
Watch out This premise fails when bankruptcy or permanent disruption threatens the firm's continuation.
- 2
Impose a severe temporary shock
Set earnings for the crisis period to an intentionally pessimistic level, including zero when testing an extreme scenario.
Pro tip Start with a simple one-year wipeout before adding more complex paths.
Watch out Do not call the shock temporary without evidence supporting eventual recovery.
- 3
Specify normalization
Choose the timing and level at which earnings recover, using a pre-crisis baseline or a revised sustainable estimate.
Pro tip Model several recovery dates rather than relying on one forecast.
Watch out Returning automatically to the old trend can conceal structural impairment.
- 4
Calculate intrinsic impairment
Value the lost crisis-period earnings and the remaining post-crisis cash-flow stream.
Pro tip Keep discount-rate assumptions visible because risk-premium changes can materially affect the result.
Watch out Do not confuse a simple illustration with a precise valuation.
- 5
Compare price with impairment
Contrast the model-implied loss of value with the actual market drawdown.
Pro tip Treat the difference as a prompt for further investigation, not automatic proof of mispricing.
Watch out The market may be pricing risks omitted from the initial scenario.
- 6
Stress-test permanent damage
Add slower recovery, weaker margins, financing stress, dilution, and failure scenarios before deciding whether the selloff is excessive.
Pro tip Assign probabilities to several scenarios and calculate a weighted value range.
Watch out Avoid applying an index-level recovery assumption indiscriminately to vulnerable individual companies.
In the wild
Siegel considered an extreme scenario in which S&P earnings disappeared for a year and then returned only to 2019 levels. His valuation reasoning implied a much smaller mechanical loss than the market's roughly one-third decline, suggesting that panic had driven prices beyond the value of the temporary earnings gap.
→ The test supported a bullish interpretation of the broad-market selloff while acknowledging recovery uncertainty.
An investor models a manufacturer with zero profit for twelve months, normalized operations in year two, and a slower-recovery alternative. The resulting valuation range is compared with a 45% share-price decline, then adjusted for debt and dilution risk.
→ The investor separates temporary lost profit from permanent balance-sheet damage before making a decision.
Common mistakes
Valuing only the next year
Using crisis-year earnings as though they represent the entire future exaggerates the effect of a temporary interruption.
Assuming an automatic V-shaped recovery
The method requires explicit recovery evidence and alternative scenarios rather than blind reversion to prior earnings.
Ignoring financing risk
A fundamentally viable business can still destroy shareholder value through bankruptcy, emergency borrowing, or dilution before earnings recover.
Is it for you?
Best for
It is best for evaluating broad equity selloffs caused by events expected to interrupt earnings temporarily.
Not ideal for
It is not ideal for insolvent firms, permanently impaired industries, or businesses whose post-crisis earnings cannot be normalized credibly.
From the transcript
“I said, stocks are the longest term assets that we have.”
“If you would wipe out a hundred percent of their earnings over the next twelve months, and then in any you know, listen, I'm a…”
“And actually I said it's going to go down more because fear always drives it down more.”
From the episode
Jeremy Siegel on the Stock Market Under Covid-19 (Podcast)