For a venture capital fund, the costliest error isn't investing in a startup that fails (a sin of commission); it's passing on one that becomes a massive success (a sin of omission). This fear drives a high-volume sourcing strategy that prioritizes seeing every potential deal.

In venture capital, a portfolio with no failed investments is a sign of a flawed, risk-averse strategy. The goal isn't to avoid losses but to back the market leader in a potentially huge category. Losing money on the leader if the entire category fails is an acceptable and expected outcome.

The most painful investment misses—the 'anti-portfolio'—can serve as the primary inspiration for a new venture firm's strategy. Nnamdi Okike of 645 Ventures used his experience passing on companies like Skype and Facebook to build a new firm specifically designed to identify and invest in similar opportunities.

Bessemer Venture Partners publicly lists massive companies it passed on to foster a learning culture. This highlights their philosophy that the opportunity cost of missing a transformative company (a crime of omission) is far more damaging than investing in one that fails (a crime of commission).

The primary risk to a VC fund's performance isn't its absolute size but rather a dramatic increase (e.g., doubling) from one fund to the next. This forces firms to change their strategy and write larger checks than their conviction muscle is built for.

Investors who lose money in a sector develop an emotional aversion, causing them to irrationally pass on the next great company in that space. This 'learning from mistakes' becomes a liability, prioritizing avoiding small losses (commission) over capturing huge wins (omission).

The financial loss from a failed startup investment is capped at 1x the capital. Conversely, the opportunity cost of passing on a company that becomes worth billions is uncapped and unlimited. This asymmetry dictates that VCs should fear sins of omission more than sins of commission.

Traditional VCs are constrained by the need for every investment to potentially return the entire fund. This creates "scope paralysis," preventing them from investing in smaller, niche markets that could be highly profitable but don't fit the unicorn model.

Conventional wisdom tells new VCs to write big checks into a concentrated portfolio. However, this is a flawed strategy because emerging managers often face adverse selection, lacking the access to top-tier deals that established firms have. This makes a concentrated approach dangerously risky for a new fund.