« Don’t put all your eggs in one basket »: the proverb is so widespread that we forget to question it. Applied to an SME, though, it leads to a false belief—that diversifying mechanically reduces risk. For an investor spreading capital, that’s true. For a company with limited resources and limited attention, it’s often the opposite: adding an activity doesn’t dilute risk, it multiplies it, opening a second front that has to be financed, understood, and steered at the same time as the first. Diversification is still a powerful lever—but only if you know which kind you’re choosing, and why.
Diversifying Reduces Risk, or Multiplies It
The basket-of-eggs image holds for anyone with a surplus to place. An SME, however, isn’t spreading a surplus: it’s redeploying resources that are already counted—the owner’s time, cash flow, teams that already keep the core business running. Every euro and every hour spent on a new activity is one less for the core. Diversification only protects if the new activity doesn’t weaken the one financing it. Badly calibrated, it turns a company that was solid on one front into a company that’s fragile on two.
The most underestimated risk, in fact, isn’t financial—it’s attentional. An owner who splits their energy between two trades serves both at half strength, and it’s usually the newer one—the most demanding to learn—that devours the time, at the expense of the more profitable one. The loss of focus shows up on no balance sheet, but it gets paid in missed opportunities on the very ground you used to master.
To that internal risk add a perception risk. A brand is worth what it clearly means in the customer’s mind; reaching too far from what you’re known for blurs that signal. The recognized specialist who suddenly starts doing everything wins little credibility on the new ground while eroding it on the old, where their promise turns vague. A brand that tries to mean everything loses the legibility that gave it value. The safest diversification is therefore also the one the customer understands without explanation, because it extends the idea they already had of you.
The Dividing Line: The Link to Your Core Business
Not all diversification carries the same risk profile, and research has documented this for a long time. Rumelt’s foundational work, drawing on decades of data, established a well-documented pattern: companies that diversify into activities related to their core business outperform those that scatter into unrelated sectors. The reason comes down to one word—transfer. A related diversification reuses what you already have: a skill, a customer base, a distribution network, a reputation. A bakery moving into catering desserts builds on its trade, its suppliers, and its clientele; the same bakery buying a garage starts from scratch on everything.
The closer the new activity is to the core, the more existing strengths carry over, and the lower the risk. At the other end, unrelated diversification—entering a wholly different sector—promises protection against one market’s ups and downs, but demands skills, resources, and reflexes you don’t have. It’s what some call « diworsification »: believing you’re spreading your risk when you’re actually stacking it. The right question isn’t « which growing market should we join », but « what do we already know how to do that extends naturally elsewhere ».
Diversify From Strength, Not From Flight
The moment you diversify often says more than the choice itself. The worst trigger is flight: launching a new activity because the core is declining, hoping the new will offset the old. It’s the riskiest scenario there is—you take a weakened company onto unfamiliar ground, without the margins or the calm needed to absorb the early fumbling. Successful diversification almost always starts from the opposite: a solid core that throws off enough to fund the exploration without putting itself at risk.
Once the right moment comes, prudence plays out in the execution: testing on a small scale before committing heavily, so you fail small rather than get it wrong big. A new product launches with a narrow segment before full rollout; a new market area is explored through a limited offer before heavy investment. And when the new activity calls for a skill you don’t have, a partnership often lets you approach it without building everything or carrying everything alone—a way of diversifying while limiting your exposure.
Conclusion
Diversifying is best read as a bet, one whose risk depends on two choices rather than on the comfort of calling it insurance. The link first—the more the new activity builds on what you already master, the better its odds of holding. The timing next—you diversify from a solid core, not to repair one that’s faltering, and you test small before betting big. Chosen this way, diversification extends the strengths of the core instead of dispersing them. The question to ask before you start: does this new activity build on what we already know how to do, or does it ask us to relearn everything?
If you’re considering diversifying without knowing how far to stray from your core business, get in touch—measuring that link is often what separates a real opportunity from one bet too many.
