How Many Bets? Portfolio Construction for the Power Law

Once you accept that a tiny number of winners drives almost all of the return, one practical question follows immediately: how many bets does it take to be reasonably sure you are holding one of them? This is portfolio construction, and it is where the power law stops being a piece of theory and becomes a concrete plan: how many companies to back, how much to put in each, and how much to keep in reserve for the ones that start to work.

Concentration is the beginner's trap

The intuitive move for a careful first-time investor is to concentrate: study hard, pick the three or four best companies, and put real money into each. It feels disciplined. Under a power law it is close to a guarantee of missing the outlier, because outliers are rare and rarely the ones that looked safest at the seed stage. With only a few positions, the most likely result is a portfolio of reasonable companies and no extraordinary one, which in venture means a portfolio that quietly returns very little.

The maths is unforgiving in a clarifying way. If, optimistically, one in twenty quality bets becomes a real outlier, then a handful of investments leaves you far more likely to hold none than one. Take more quality shots and the odds of touching at least one outlier climb quickly. This is why experienced angels and seed funds run portfolios of dozens, not a handful, and why AngelList's data shows broader portfolios capturing the returns that concentrated ones miss.

Diversification has a floor, not just a ceiling

None of this means index the whole market. More bets only help if each one still clears the screen, because the power law rewards quality outlier exposure, not raw quantity. There is also a practical ceiling: past a point, spreading money across hundreds of tiny positions dilutes the attention and access that help you pick and support winners, and shrinks each stake until even an outlier moves the result only a little. The target is a band, wide enough to be statistically likely to hold an outlier, narrow enough that you actually backed each company on purpose. For most individual investors that band is roughly twenty to forty companies, built over time rather than all at once.

Reserves: the part beginners forget

The most common mistake after portfolio size is deploying all the capital into first cheques and keeping nothing back. The power law makes this expensive, because the same logic that says most bets fail also says a few will visibly start to win, and those are the moments you most want more money to invest. Seasoned investors hold a meaningful share of their capital in reserve to follow on into the companies that are working, often protecting their ownership through a pro-rata right. A dollar invested into an emerging winner you already know well is worth far more than a dollar into a new unknown, and an investor with no reserves cannot make that dollar count.

Ownership is the other half of the return

Returns are outcome multiplied by ownership, and beginners tend to fixate on the first and ignore the second. A tiny stake in a company that returns 50x still returns little in absolute terms if the cheque was small relative to your fund. This is the discipline behind cheque sizing: each first cheque should be large enough that, if that company becomes the outlier, the position is big enough to move your entire portfolio, and reserves should let you defend that ownership as the company raises more. Size, quality, reserves and ownership are not four separate decisions. They are one plan, and the power law is the logic that ties them together.

The takeaway

Portfolio construction is where an investor's beliefs become a plan. Back enough quality companies that you are statistically likely to hold an outlier, roughly twenty to forty for most individuals, built over time. Keep each bet above the bar of the first-pass screen. Hold reserves to follow on into the ones that work. And size first cheques so that a single outlier can carry the whole portfolio. Do those four things and you have turned the power law from a source of anxiety into an operating system.

It is also one reason a syndicate exists. Building a portfolio of dozens of well-screened B2B companies, with reserves to follow on, is hard to do alone, especially while keeping the bar high on every name. EvoScale Capital lets investors assemble that exposure deal by deal, each one read through the same screen, so the portfolio is broad enough for the power law and disciplined enough to deserve it.