How I Think About Portfolio Construction

Choosing a great company is only part of the investment process. The more important question is whether that company makes the portfolio stronger.

From Principles to Decisions

Investing decisions are rarely based on a single factor. A company may be exceptional but too expensive. It may offer attractive growth but add too much exposure to a sector I already own. Or it may be a strong investment on its own, but still less compelling than adding to an existing holding.

What I Look For

Quality

I look for businesses with durable competitive advantages, strong financials and management teams capable of allocating capital wisely.

Valuation

A great company is not necessarily a great investment at any price. I want the quality of the business and its long-term prospects to justify the price I pay.

Diversification

A new holding should bring something useful to the portfolio rather than simply duplicate exposures I already have.

Resilience

I want the portfolio to contain businesses capable of performing across different economic environments, not only when conditions are favourable.

Concentration

Conviction matters, but so does balance. Before adding a company, I consider how much exposure I already have to its sector, geography and underlying economic drivers.

Opportunity Cost

Every investment competes for capital. Before buying something new, I ask whether it offers a better long-term opportunity than simply adding to one of the businesses I already own.

Replacement

Sometimes improving a portfolio means replacing rather than adding. A new company must earn its place.

From Analysis to Action

Analysing a company is only the beginning. The real question is what to do next.

Activity is not the same as progress.

Putting the Principles Together

Case Study: Thales

An exceptional business—but does it deserve a place in the portfolio?

Thales has many of the qualities I look for in a long-term investment and would bring a new dimension to the portfolio. But identifying an exceptional business is only the beginning. Its valuation, its impact on portfolio concentration and the opportunity cost of investing new capital must all be considered before making a decision. For now, Thales remains on my radar.

A great company can pass the quality test without yet passing the portfolio test.

The Portfolio Comes First

Individual companies may attract my attention, but the portfolio always comes first. Every investment must justify not only why it deserves to be owned, but why it deserves to be owned alongside everything else.

The goal is not to own every great company. It is to build a great portfolio.