The Power Law in Venture

Venture Capital

Published September 2024  •  Insights WM Capital Team

One of the most important things to understand about venture capital — and one of the most consistently misunderstood by founders, LPs, and outside observers alike — is that the return distribution of a venture portfolio is not normal. It does not look like a bell curve, where most investments cluster around a median outcome with a few outliers on either side. It looks like a power law: a small number of investments return many times their cost basis, a moderate number return some multiple, and the majority return little or nothing.

This is not a failure of the venture model. It is the venture model. And understanding it deeply — its implications for portfolio construction, for how we evaluate individual investments, for what we are optimizing for when we write a seed check — is foundational to being a good seed investor. This piece is our attempt to articulate that understanding clearly.

The Mathematics of the Power Law

Empirical data on venture fund returns consistently shows that the top 10% of investments in a typical fund account for approximately 90% of total fund returns. In the best-performing funds, this concentration is even more extreme — a single investment may account for more than the entire fund's cost basis in returns, turning every other investment into house money even if they all went to zero.

This means that the primary job of a seed investor is not to avoid losses — losses are structurally inevitable and acceptable in a power law return environment — but to ensure exposure to the investments that will generate the extreme outcomes. Missing the outliers is the cardinal sin of seed investing. Being in a company that returns 2x or 3x is marginally better than losing the investment; being out of a company that returns 100x is devastating to fund performance.

The implications of this mathematics are often counterintuitive. It means that in a close decision between investing and passing, the cost of false negatives (passing on a company that becomes enormous) is typically higher than the cost of false positives (investing in a company that fails). It means that the ability to identify and get access to genuinely exceptional outlier opportunities is worth more than the ability to avoid mediocre investments. And it means that portfolio construction decisions — how many investments to make, how much to reserve for follow-on, how to manage ownership percentages — must be made with the power law in mind, not with the risk management instincts that work in conventional asset management.

What Outlier Outcomes Have in Common

If power law returns are concentrated in a small number of investments, the analytical question is: what characteristics are predictive of those outlier outcomes? This is a question we have spent significant effort studying, both through our own portfolio analysis and through careful examination of historical venture data and case studies.

The pattern that emerges most consistently is that outlier outcomes are associated with outlier market size, outlier product differentiation, or outlier founder capability — and most often with some combination of all three. Companies that generate 100x returns for their early investors typically do so because they addressed a market that proved to be much larger than anyone anticipated, or because they built a product differentiation so strong that it proved almost impossible to compete with, or because they had a founder whose ability to adapt, recruit, and execute compounded over time into a sustainable organizational advantage.

None of these factors are perfectly predictable at the seed stage. Market size estimates are notoriously unreliable — the best companies often create markets that did not exist before, making TAM analysis at the seed stage somewhat circular. Product differentiation is visible but subject to competitive response that is impossible to fully anticipate. Founder capability is assessable but subject to growth limits and personal circumstances that create uncertainty.

This uncertainty is not a reason to despair about seed investment evaluation. It is a reason to focus on the factors most predictive of optionality — the characteristics that suggest a company has a plausible path to becoming an outlier, even if that path cannot be clearly specified. Founder-market fit, genuine consumer insight, defensible distribution strategy, and a core product mechanic with real retention are the factors we find most predictive of optionality at the seed stage.

Portfolio Construction Under the Power Law

Our $190M Seed Round fund is structured to make approximately 30 to 40 initial investments, with capital reserves for follow-on in the most promising performers. This construction reflects the power law reality: we want enough investments to ensure statistical exposure to potential outliers, while maintaining enough concentration per investment to build meaningful positions in the companies that prove to be exceptional.

The reserve allocation question is one of the most important in seed portfolio construction. Seed funds that reserve too little find themselves unable to maintain ownership percentages in their best companies as those companies raise subsequent rounds — dilution that, in power law terms, is very costly because it is dilution in the outlier investments that drive returns. Seed funds that reserve too much concentrate their capital in a smaller number of follow-on investments, reducing the breadth of initial bets and potentially missing outliers they would have caught with a broader initial deployment.

Our approach is to reserve approximately 40-50% of capital for follow-on, deployed selectively in the companies that demonstrate the strongest early evidence of outlier potential. This means we are willing to make small initial seed checks to establish positions in companies where our conviction is moderate but our curiosity is high, preserving capital to increase those positions significantly when conviction improves.

Implications for How We Evaluate Investments

The power law should affect not just portfolio construction but the way each individual investment is evaluated. When we are considering a seed investment, the primary question is not "is this likely to be a good investment?" but "does this company have a realistic path to being an outlier investment?" These are related but different questions, and the difference matters.

A company with a moderate but reliable path to a $100M exit may be a better investment by expected value than a company with a small chance of a $1B exit and a high chance of failure. But in a power law return environment, the expected value calculation is less relevant than the distribution analysis. A portfolio of moderate outcomes does not create a venture fund — it creates a private equity fund with worse economics. A portfolio with a few outliers and many failures creates the venture fund return profile that LPs invest for.

This means we deliberately make some investments where the probability of success is lower than in a conventionally risk-averse analysis, because the outcome profile in the success cases is so extreme that it justifies the elevated failure rate. It also means we are more willing to invest in founders pursuing genuinely novel ideas in large unaddressed markets than in founders pursuing well-defined opportunities in well-understood markets, because the latter category produces more predictable but less extreme outcomes.

What This Means for Founders

Understanding the power law has practical implications for founders approaching seed investors. The investor you want as a partner at the seed stage is one who genuinely understands that power law dynamics require tolerance for bold bets, who is not trying to optimize every investment for a moderate but reliable outcome, and whose support for your company will be sustained through the difficult periods that every startup encounters before it either fails or becomes exceptional.

The investor you do not want is one whose private calculus is focused on avoiding losses and protecting their DPI, because that investor will apply pressure at the wrong moments — pushing you toward safe pivots, premature revenue focus, or sub-optimal exits when the high-variance path, properly understood, would have been far more valuable for both of you.

At Insights WM Capital, we are explicit about being power law investors. We are backing companies we believe have genuine outlier potential, and we are prepared to support those companies through the non-linear paths that outlier outcomes require. That clarity of purpose — we think — makes us better partners, not just better investors.