Privat Capital holds a concentrated portfolio of 16-17 stocks. This strategy forces deep conviction in each position and ensures that winners have a meaningful impact on fund performance. Over-diversification can dilute both research focus and the potential returns from a fund's best ideas.

The highly successful NZ Superfund derives its value from a few large, high-conviction strategic bets where it has a unique edge, rejecting the conventional wisdom of broad global diversification for large asset owners.

The most successful venture investors share two key traits: they originate investments from a first-principles or contrarian standpoint, and they possess the conviction to concentrate significant capital into their winning portfolio companies as they emerge.

Despite his legendary status, Warren Buffett's investment hit rate is only 3-4%, mirroring the broader market where 4% of stocks generate all returns. This highlights that even for the best investors, success is driven by a small number of massive home runs, not by being right most of the time.

Successful concentration isn't just about doubling down on winners. It's equally about avoiding the dispersion of capital and attention. This means resisting the industry bias to automatically do a pro-rata investment in a company just because another VC offered a higher valuation.

Contrary to typical risk-off strategies, ARK Invest manages risk by concentrating its portfolio into its highest-conviction names during market downturns. Conversely, during bull markets, as opportunities like IPOs increase, the firm diversifies its holdings to capture broader upside.

Successful investing isn't about being right all the time; it's about making your wins exponentially larger than your losses. Top investors like Paul Tudor Jones only enter trades where the potential reward is at least five times the risk, allowing them to be wrong often and still profit.

Research for "The Myth of Capitalism" revealed that top investors frequently own dominant companies in industries with few players. This suggests that seeking out businesses with strong market positions, often due to a lack of intense competition, is a proven strategy for long-term portfolio growth and stability.

The trend of running a holding company (a portfolio of businesses) is often a path to distraction and shallow expertise. The wealthiest entrepreneurs typically achieve success by focusing intensely on a single venture for an extended period, mastering its operations before considering diversification.