Portfolio Building · Stocks Explained

Look through the labels

A portfolio containing a chip designer, a data centre supplier and a software company may have three names but a shared dependence on technology spending. Geography, customers, interest rates and access to capital can connect apparently different businesses.

Begin with position weights, then map the economic drivers. Include employer shares and the companies already owned through funds. Personal income can also be linked to the same sector as the portfolio.

Calculate combined exposure

Suppose 20% of a portfolio is held directly in a company. Another 40% is in a fund that allocates 10% to that company. The indirect exposure is 4% of the total portfolio, giving 24% combined exposure.

Repeat this exercise for the largest holdings and shared sectors. Fund names are not enough. Read the holdings and the date of the disclosure because allocations change. Some funds can be concentrated even when they contain many securities.

Distinguish kinds of risk

Diversifying can reduce dependence on a single company or industry. It does not remove broad market losses. Correlations can rise during stress, and assets that behaved differently in a quiet period may fall together when liquidity deteriorates.

A portfolio of stocks remains exposed to equity risk even if it spans countries and industries. Cash needs, investment horizon and other assets influence how much of that exposure is appropriate.

Use a repeatable review

Create a simple table with each holding, its weight, currency, sector, major revenue region and main business driver. Group shared risks and record which exposures dominate under a weak economic scenario.

Review after large price moves, acquisitions or changes in fund holdings. Avoid adding tiny positions merely to increase the count. Each position should have a purpose that can be explained alongside the overall allocation.

Try it yourself

A portfolio has 15% directly in Company A and 30% in a fund with a 20% weight in Company A. What is the combined exposure?

Show the worked answer

The fund contributes 6% of the portfolio, calculated as 30% times 20%. Combined exposure to Company A is 21%. This example assumes no other indirect holdings.

Further reading

Educational material. Examples are hypothetical and do not recommend a security or a personal allocation.

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