Six Principles for Building a More Resilient Investment Process

In a recent LinkedIn post, Michael Merlin discusses six principles for choosing investments that can withstand changing market conditions. This article covers Merlin’s post and examines the framework he presents; it is not written by Merlin.

“Managing risk creates a stronger investment process.”

Merlin’s argument centers on the difference between pursuing high returns and making decisions with risk in view. He points out that a rising market can make a wide range of assets appear appealing, while a shift in conditions reveals whether an investment case rests on durable fundamentals or market enthusiasm.

Focus on fundamentals, value and downside

Three of Merlin’s principles address what investors buy and what they pay. He recommends prioritizing competitive advantages, lasting demand and strong fundamentals over speculation. He also cautions that an excellent asset may still disappoint if its purchase price is higher than its underlying value.

“Even excellent assets can disappoint when their purchase price exceeds their underlying value.”

That distinction puts valuation alongside quality in Merlin’s framework. He also urges investors to assess potential losses and consider how an investment might perform in difficult conditions. According to Merlin, evaluating downside helps make the decision more complete than focusing on possible gains alone.

Give investments time, while managing exposure

Merlin’s remaining principles concern patience, diversification and understanding. He argues that suitable investments may need time to grow, allowing compounding to work when conditions support it. At the same time, he recommends spreading exposure across suitable assets to reduce dependence on a single holding.

Know the investment case

Merlin also advises investing where the investor can explain how value is created and what might weaken the case. That emphasis on understanding connects the practical choices—what to own, at what price and in what proportion—to the ability to assess whether the original reasoning still holds.

“It requires understanding what you own, what you could lose, and what you expect to gain.”

In Merlin’s view, those questions are central to investment success. His post presents quality, valuation, risk and time as connected considerations rather than a search for exciting predictions. It closes by asking readers which principle most influences their own decisions.

Merlin also points readers to his book, Financial Longevity: Increase Your Wealth Span, Spend Money Guilt-Free, and Gain the Confidence to Enjoy Your Bigger Future. The LinkedIn post’s central message, however, is its six-part decision framework: favor sound analysis, understand potential losses and make choices that can be explained.