Merryn Talks Money
Episode Title: Active vs Passive: How to Help Your Kids Invest
Host: Merryn Somerset Webb
Guest: John Stepek (Senior Reporter, author of Money Distilled)
Date: April 1, 2026
Episode Overview
This episode tackles a perennial investing debate: Is it better to invest actively by picking funds, ETFs, and trusts, or to keep it simple with passive, low-cost global index trackers? Merryn Somerset Webb and John Stepek respond to a listener question—specifically, how to advise younger investors (like your children) when making these decisions, given their long time horizons. Using real data and lively discussion, they dig into long-term performance, the limitations and hidden risks of both strategies, and some practical guidance on finding the right approach.
Key Discussion Points & Insights
1. Listener Question: Active vs Passive for the Next Generation
- [03:36] The questioner, Robert, asks if it's worth trying to pick a "mixed bag" of active funds, ETFs, and investment trusts or whether it's simply better to put everything into a global tracker (like a Vanguard world tracker).
- Host Commentary: Merryn and John wish for more detail around what constitutes a "mixed bag," but agree the core question is one of ongoing relevance: Is active management worth it vs. being passive?
Notable Quote
"Basically, it's saying, is there any point in investing actively when you can just buy passively and be done with the whole thing?"
—Merryn Somerset Webb [03:31]
2. Historical Performance: What the Data Says
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[03:43–06:19] John provides hard numbers:
- MSCI World Index (global equities): ~9% annual return in sterling over the last 40 years (since 1987).
- Scottish Mortgage Investment Trust: Nearly 13% a year since 1989, outperforming the benchmark during some periods.
- Berkshire Hathaway (Warren Buffett): 16.5% annually since 1987.
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Context and Caution:
- Outperformance by specific active funds is real but unusual; success is uneven and often tied to exceptional managers or particular eras.
- "Beating 9% a year through active management would have been a challenge... it's quite a high hurdle."
—John Stepek [06:08]
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Practical Investment Choices:
- Most investors would not have been comfortable putting all their money in a single trust or company—even famous winners.
3. The Hidden Risks of Passive Investing
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[06:19–07:54] Merryn highlights issues with “just” buying a global tracker:
- Hidden Momentum: Indexed investors unintentionally become momentum investors, overweighting whatever is currently dominant (now: US tech).
- Concentration Risk: The MSCI World is now 61% US (compared to 30% in 1987); Japan has fallen from 40% to 5%.
- Structural Change Considerations: We may be at the start of a "great rotation"—the dominance of US tech could fade.
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Even Going Passive Is an Active Choice
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"Everything is active. Everything is active. And even going fully passive is an active decision to be a US tech heavy momentum investor."
—Merryn Somerset Webb [07:56] -
Alternative Approaches: Equal-weighted global trackers as a less momentum-driven version of “passive” (often harder to buy).
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4. Asset Allocation: The Underestimated Active Decision
- [08:50–10:24]
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John reiterates that even passive investors are making allocation choices: by geography, sector, and weight.
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He suggests using the global tracker as a “reference point,” then deciding on your own tilts (e.g., more UK stocks, emerging markets, specific sectors).
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Notable Quote:
"If I think I can beat this, what would I do differently to the global tracker?"
—John Stepek [09:25]
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Memorable Moments & Quotes
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On the mirage of pure passivity:
“There is no such thing as a passive combination of passive trackers.”
—Merryn Somerset Webb [07:52] -
On generational investing:
“I don’t think any sensible investor would have put 100%…into Scottish Mortgage Trust in 1989. ...I don’t think most people would have thought like that.”
—John Stepek [05:29] -
On allocation drift:
“In 1987, [the global tracker] had about 30%...in the US and now it’s 61%. Whereas...[in] the late 1980s it had actually about 40% in Japan and now that’s down to just over 5%.”
—John Stepek [08:56]
Practical Takeaways
- For parents/advisors: There is rarely a clear winner between “active” and “passive”—both involve choices and risks. Simplicity and diversification are virtues, but don’t assume passivity is risk-free or “neutral.”
- For young investors: Be aware of concentration risks in global trackers; consider if you want to deviate from market weights and why.
- On performance: While standout managers (Buffett, specific trusts) exist, they’re rare and often only apparent in retrospect.
- On future returns: Past outperformance from US tech-heavy indices may not persist.
Segment Timestamps
- 03:36 — Listener question introduced
- 03:43–06:19 — John discusses historical returns and challenges active management faces
- 06:19–07:54 — Merryn explores the risks and hidden choices in “passive” investing
- 07:54–10:24 — Discussion on asset allocation and how all investing is, ultimately, active
- 10:24–end — Wrap-up: recognizing the complexity, inviting more listener questions
Tone & Style Notes
- Relaxed and conversational, with frequent gentle humor and irony about the complexity (and possible futility) of investing debates.
- Both hosts blend practical data with skepticism about simple answers in finance.
Final Thought
This episode underscores that every investment approach—active or passive—has its trade-offs, and even the most “set-and-forget” strategies involve active decisions. The best advice for young investors? Know what you own, understand the risks, and don’t chase certainty in an uncertain market.
Notable Quotes Recap
- Merryn Somerset Webb: "Everything is active. And even going fully passive is an active decision to be a US tech heavy momentum investor." [07:56]
- John Stepek: "Beating 9% a year through active management would have been a challenge, I think, over the last 40 years. Which is not to say that passive is definitely going to do better over the next 40, but it’s quite a high hurdle." [06:08]