Merryn Talks Money: Live From The Master Investor Show with Jim Mellon & Stephen Yiu
Date: May 1, 2026
Host: Merryn Somerset Webb (Bloomberg)
Guests: Jim Mellon (Investor & Chairman, Burnbrae Group), Stephen Yiu (Blue Whale Fund Manager), John Stepek (columnist)
Episode Overview
This episode features a live panel from the 2026 UK Master Investor Show, where Merryn Somerset Webb is joined by celebrated investor Jim Mellon, top fund manager Stephen Yiu, and columnist John Stepek. The discussion covers the fraught state of the UK and global economies, debt challenges, AI and data center investing, the future of work in a world of robotics, energy constraints, and pragmatic investment ideas for the turbulent times ahead.
Key Discussion Points & Insights
1. The State of the UK & Global Economies
[03:02–05:50]
- Backdrop of Anxiety: The episode kicks off with Merryn referencing a sense of nostalgia and economic gloom, noting even Gen Xers long for the 1990s.
- UK Macro View (John Stepek):
- A fleeting moment of optimism at the start of 2026 turned sour post-war, with inflation and debt to GDP at 95%.
- No room for fiscal maneuver: “The thing that causes political instability... is this massive level of debt... So the real problem is the debt. And the only way out of that at this point is to grow your way out or inflate your way out.” — Merryn Somerset Webb [05:12]
- Global Context & US Debt (Jim Mellon):
- US Debt Crisis: Now at $39 trillion federal (and 130% of GDP with state/consumer debt), surpassing even World War II levels.
- Personal vs Systemic Debt: While UK households and corporations are “remarkably robust,” US consumers suffer high debt and low savings rates.
- Fiscal outlook: “The fiscal deficit... is about 6% of GDP and it’s getting bigger... They’re just racking up debt like a drunken sailor.” — Jim Mellon [07:58]
- Trigger for Crisis:
- When will these mounting US deficits morph into a real crisis? “The scale at which the US dollar... is being de-dollarized... is very rapid.” — Jim Mellon [10:06]
- Stock market danger: “The CAPE Shiller is about just under 40, and every time it’s ever got to 40 there’s been a subsequent major correction.” — Jim Mellon [10:41]
2. AI, Data Centers & Market Implications
[11:58–17:23]
- Bottom-up Stock Picking (Stephen Yiu):
- Says he avoids macro worries by focusing on cash-rich, profitable US companies, even as the US government itself faces debt headwinds.
- The Big Buildout: Data Center Capex
- “Half of American GDP growth... comes from this [data center] one thing. Is this going to end in tears?” — Merryn [12:33]
- Stephen Yiu: “We are probably at the early innings of this AI super cycle... The new applications coming out... are very encouraging.” [12:51]
- Disagreement: Is the continuous data center expansion justified? Stephen believes so but notes advances (e.g., from Anthropic, Alphabet) may lower the intensity/cost over time, further spurring adoption and use-cases.
- AI Infrastructure Winners:
- Rather than big tech AI spenders, Yiu’s fund prioritizes infrastructure: “We have a number of companies within the AI data center space like Vertiv... Hynix... Lumentum... I want the money to be wasted with my companies as a shareholder.” — Stephen Yiu [17:09]
3. China, AI Competition & Survivors
[19:47–22:50]
- Jim Mellon’s Caution:
- Chinese AI models, such as DeepSeek, train “a million tokens for about a tenth the price of Anthropic.” [19:56]
- “Energy cost in China... is much lower... The China models are going to be a very big factor in this whole AI thing.”
- “The circularity is really huge in this industry and ultimately that all collapses on itself... OpenAI is going to go bust or... have to be absorbed by Microsoft...” [21:01]
- Survivors: Only a few of the “Mag 7” (Big Tech) will endure; the rest risk failure amid debt and cash flow concerns.
- Robotics: Jim sees this as the “best use of AI,” foreseeing robots in daily life within 15 years.
4. The Future of Work in the AI & Robotics Era
[22:50–26:32]
- Automation and Unemployment Concerns:
- Merryn poses the perennial question: “What will my children do once Jim’s Utopia has arrived — a world full of robots doing everything?”
- Stephen Yiu: Paints a “dark scenario” if unchecked, predicting societal friction and the need for regulation to slow job-destroying advances. “Without that, I think we could go into a very dark place.” [24:04]
- Jim Mellon: Emphasizes human roles requiring empathy — “Robots can’t do that and they never will.” — Jim [25:51]
- Prepares young people not by choosing a fixed career path, but by cultivating agility.
5. Commodities, Energy & the Material World
[27:13–29:44]
- Resource Constraints are Back:
- John argues for a “distinct shift” to a more inflationary, fragmented world with “higher commodity prices” as “everyone needs to stockpile more stuff.” [27:13]
- Uranium & Nuclear:
- Jim's no-brainer pick for the energy transition as China rapidly builds nuclear capacity; US lags. “By uranium, I think it’s an absolute no brainer.” — Jim [28:08]
- AI Power Consumption:
- Stephen's portfolio responds by investing in Siemens Energy, focused on gas turbines likely to power AI data centers.
6. UK Investing & Final Stock Picks
[29:44–33:20]
- UK Markets—Brighter Than They Appear?
- John: “Basically it’s just a good country in a decent state with crap governance...” [30:04]
- Recurring theme: UK small cap and cyclical equities look undervalued if (a big if) policy improves.
- Simmering optimism: “Companies find a way... in the early 1990s when interest rates shot up to 15%... Companies still found a way to survive, so they'll keep getting by.” — John [31:11]
- Top Investment Picks (excluding gold/bitcoin):
- Stephen Yiu: SK Hynix (Korean memory company), “valued at 4x forward PE…going to do a dual listing in the US in the next few months.” [31:54]
- Jim Mellon: Japanese yen is “the most undervalued major financial asset in the world. Interest rates going up…if there’s a problem in the US…I think the yen…is my best bet.” [32:23]
- John Stepek: Also picks the yen, suggests Japanese equities benefit from the turnaround. [33:07]
Memorable Quotes & Moments
-
"The fiscal deficit is running at about 6% of GDP and... they're just racking up debt like a drunken sailor."
— Jim Mellon [07:58]
-
On AI infrastructure:
"I want the money to be wasted with my companies as a shareholder."
— Stephen Yiu [17:09]
-
"OpenAI is going to go bust or it's going to have to be absorbed by Microsoft.... The circularity is really huge in this industry and ultimately that all collapses on itself."
— Jim Mellon [21:01]
-
"If you’re a young person... don’t choose a sport yet because no one knows what the sport will be. Just be ready."
— Jim Mellon [25:29]
-
On commodities and deglobalization:
"We’re going to move into a world of kind of distinct, kind of blocks of interest... redundancy... the prices of stuff is going to go up."
— John Stepek [27:13]
-
"By uranium, I think it’s an absolute no brainer."
— Jim Mellon [28:08]
-
UK economy summary:
"Basically it’s just a good country in a decent state with crap governance... what we need is a government that will unwind some of that stuff and that would really, I guess, put a rocket boost under the economy."
— John Stepek [30:04]
-
Investment blitz:
Q: "If you could only invest in one thing, what would it be?"
- Stephen: “SK Hynix.” [31:54]
- Jim: “The Japanese yen.” [32:23]
- John: “Japanese yen—could get a double whammy by buying Japanese equities.” [33:07]
Key Timestamps
- 02:09–03:02 — Set up: master investor show, economic mood
- 03:02–05:50 — UK economic diagnosis & debt
- 06:39–09:43 — US debt, fiscal trajectory, global risk
- 11:58–13:54 — Stock picking through turmoil, AI Capex
- 14:25–17:23 — Data center infrastructure bets & rationale
- 19:50–22:50 — China’s AI threat, industry shakeout, robotics
- 23:58–26:32 — The future of work post-robotics
- 27:13–28:53 — Commodities, uranium, energy in AI
- 29:44–31:38 — UK value investing, governance vs. fundamentals
- 31:54–33:20 — Panel’s best investment picks
Tone & Takeaways
The conversation is candid, pragmatic, occasionally humorous, and pervaded by a sense of cautious optimism amid macro uncertainty. Rather than doomsaying, the panel emphasizes adaptability, critical thinking, and practical investment strategies. They balance concern about systemic risks (debt, AI excess, energy constraints) with clear routes investors can take to navigate or even benefit from these challenges—whether through resilient equities, infrastructure plays, commodities, or timely currency bets.