Moonshot Expected-Value Test
Price strategic bets by multiplying their upside by their probability of success
- Difficulty
- Moderate
- Time to result
- ~days to results
- Steps
- 6
- Confidence
- 93%
The Moonshot Expected-Value Test evaluates a strategic investment as a probability-weighted portfolio of outcomes. First define what success means and estimate the economic value created if it occurs. Then assign an honest probability to that outcome and repeat the calculation for partial success, failure, and any downside exposure. Add the probability-weighted outcomes, subtract the purchase price and future capital requirements, and compare the result with alternatives such as building internally or accepting decline. The Jet discussion illustrates why a seemingly expensive acquisition can still be rational: even a small chance of securing a meaningful position in an enormous future market may have expected value above the purchase price. The method does not eliminate judgment; it forces the investor to expose the probabilities and valuations where judgment is hiding.
Origin
Extracted from Acquired's debate over whether Walmart's $3.3 billion purchase of Jet could be justified by a small chance of success in an enormous retail market.
Core principles
- 01Evaluate uncertain bets probabilistically rather than emotionally
- 02Large upside can justify a low-probability investment
- 03Include strategic survival value alongside direct profit
- 04Make probability and payoff assumptions explicit
- 05Compare expected value with price and credible alternatives
How to run it
- 1
Specify success
Define the operational and financial state that would count as success, including the time horizon.
Pro tip Use a measurable outcome such as market position, cash flow, or avoided decline.
Watch out A vague definition lets advocates move the goalposts later.
- 2
Value each outcome
Estimate the value of full success, partial success, failure, and major downside cases.
Pro tip Include strategic assets such as talent, technology, customers, and survival value where they are genuinely relevant.
Watch out Do not count the same benefit in multiple outcomes.
- 3
Assign probabilities
Give every outcome an explicit probability based on evidence, base rates, and competitive conditions.
Pro tip Collect independent estimates before discussing them as a group.
Watch out Tiny probability changes can dominate the answer when the upside is enormous.
- 4
Calculate expected value
Multiply each outcome's value by its probability and sum the results.
Pro tip Use ranges as well as point estimates to expose uncertainty.
Watch out Expected value is not the same as the most likely outcome.
- 5
Deduct total commitment
Subtract the acquisition price, integration burden, required follow-on capital, and opportunity cost.
Pro tip Model future funding needs rather than treating the purchase price as the full cost.
Watch out A capital-hungry business can consume far more than its initial price.
- 6
Compare alternatives
Evaluate the expected value of building internally, buying another asset, partnering, or doing nothing.
Pro tip Include the cost of likely decline when the status quo is not neutral.
Watch out A positive expected value does not make a bet optimal if a better alternative exists.
In the wild
The hosts considered a hypothetical trillion-dollar opportunity and a one percent chance that Jet could succeed meaningfully. Under those illustrative assumptions, the probability-weighted upside would be $10 billion before costs, exceeding the $3.3 billion purchase price even though failure remained the overwhelmingly likely individual outcome.
→ The acquisition could be financially rational as an asymmetric strategic option despite low confidence in success.
A retailer estimates a 10% chance that a £100 million platform investment preserves £1 billion of long-term enterprise value, a 30% chance it creates £100 million, and a 60% chance it produces nothing. After weighting the outcomes and deducting follow-on costs, it compares the result with managed decline.
→ Leadership makes the survival bet with its assumptions and downside visible rather than relying on urgency alone.
Common mistakes
Confusing likely with valuable
A low-probability outcome can still justify investment when its payoff is sufficiently large.
Using arbitrary heroic assumptions
The result is only as credible as the probabilities, valuations, and base rates behind it.
Ignoring follow-on capital
An acquisition that needs years of funding must be evaluated using its total expected commitment, not only its headline price.
Is it for you?
Best for
It is best for acquisitions, venture investments, platform bets, and defensive moves with asymmetric outcomes.
Not ideal for
It is not ideal when probabilities and payoffs cannot be bounded even roughly or when failure threatens the firm's survival.
From the transcript
“you kind of have to do an expected value calculation and figure out like what do you think the chances that this thing actually succeeds…”
“if there's a 1% chance um that it succeeds that expected value is still ten ten billion”
“the thing this is the art uh of being an investor versus the science. Like what are these probabilities?”
From the episode
Jet