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Paul Black’s 3 thumb rules for identifying great wealth creators

By Sohail Khan 29 August 2026, 4:04 pm

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Paul Black’s 3 thumb rules for identifying great wealth creators
Synopsis

Veteran portfolio manager Paul Black’s investment framework focuses on identifying businesses with competitive advantages that strengthen over time. His three key rules emphasise widening moats, strong corporate cultures and improving returns on invested capital, while patience and an information edge can help investors identify and hold potential long-term wealth creators.

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Paul Black’s 3 thumb rules for identifying great wealth creators<br>

Successful long-term investing is not simply about finding stocks that are growing rapidly. The bigger challenge is identifying businesses whose competitive advantages can strengthen over many years and whose organisational culture supports that advantage.

Paul Black, veteran portfolio manager, believes investors should focus on companies with strong growth prospects, widening competitive moats and cultures that reinforce their strengths. His investment philosophy offers three important rules for identifying potential long-term wealth creators.

1. Look for a competitive moat that is getting stronger

Black's first principle is to focus not merely on whether a company has a competitive advantage, but on the direction in which that advantage is moving.

A business may have a strong moat today, but that does not necessarily mean it will remain protected five or 10 years from now. Investors should therefore assess whether the company's competitive position is strengthening or weakening.

Businesses that continually widen their moat can become increasingly difficult for competitors to challenge. This can allow them to sustain growth and generate superior returns over long periods.

For investors, the key question is not simply whether a company is good today, but whether its competitive advantage is likely to become stronger over the next five, 10 or even 15 years.

2. Give corporate culture a high premium

The second rule is to examine the culture of a business and determine whether it is aligned with its competitive advantage.

Black believes a company's values, employee behaviour and management philosophy can play a crucial role in determining whether its moat continues to expand. A strong competitive position becomes more durable when the organisation's culture encourages decisions and behaviours that reinforce it.

Investors therefore need to look beyond management presentations and financial statements. Understanding the culture can involve speaking with former employees, suppliers, vendors and even competitors. Such conversations can help investors build a broader picture of how a company operates.

This qualitative assessment is difficult to capture in a spreadsheet, but it can provide an important edge when evaluating businesses for the long term.

3. Focus on the direction of ROIC, not just its level

Another important indicator Black highlights is Return on Invested Capital, or ROIC.

A high ROIC is generally viewed as a sign of an efficient and profitable business. However, Black places greater emphasis on the direction of ROIC rather than simply its absolute level.

A company whose ROIC is steadily improving could indicate that its competitive advantage is strengthening and that management is becoming increasingly efficient at deploying capital.

Conversely, a business with a high ROIC that stops improving may not have the same long-term potential as a company whose returns on capital are consistently rising.

Think differently from the market

Black also believes investors need to develop an information advantage. Simply spending most of one's time building financial models and valuation spreadsheets may not provide a meaningful edge because thousands of analysts are doing similar work.

Instead, investors can focus on areas that are harder to quantify, such as corporate culture, competitive behaviour, customer relationships and the sustainability of a company's moat.

This approach can help investors identify developments before they become obvious in conventional financial metrics.

Give great businesses time to compound

One of the central ideas in Black's philosophy is the importance of patience.

Once investors identify businesses with strong cultures and expanding competitive advantages, frequently buying and selling them may undermine the benefits of long-term compounding. Great wealth creators can require years for their competitive advantages, earnings and cash flows to compound.

Black's framework therefore encourages investors to think in five-, 10- and 15-year periods rather than focusing excessively on short-term market movements.

Manage risk by owning stronger businesses

Black's approach to downside protection is also linked to competitive advantage. Companies with strong balance sheets, resilient businesses and expanding moats may be better positioned during difficult economic periods.

When weaker competitors face financial constraints, stronger companies can potentially use their financial strength to invest, gain market share or strengthen their competitive position.

For long-term investors, therefore, risk management does not necessarily mean avoiding volatility. It can also mean owning businesses that are structurally better equipped to withstand difficult periods.

Ignore the market noise

Black's philosophy ultimately comes down to maintaining a long-term perspective.

Constant market commentary can encourage investors to focus on three- or six-month outcomes instead of the much longer periods required for business fundamentals to play out. Investors who understand a company's competitive advantage may therefore benefit from avoiding unnecessary reactions to short-term market noise.

The broader lesson from Black's framework is that great wealth creators are not necessarily the cheapest stocks or the fastest-growing companies. They are businesses whose competitive advantages can widen, whose cultures reinforce those advantages and whose returns on capital improve over time.

For investors searching for long-term compounders, identifying these characteristics may be more valuable than simply looking for a low valuation or a high near-term growth rate.

(Disclaimer: Recommendations, suggestions, views and opinions given by the experts are their own. These do not represent the views of The )

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