Position sizing and letting winners grow

This episode of our new showThe 100 Year Thinkers brings together Chris Mayer and Ian Cassel for a deep discussion on long-term stock picking, microcap investing, business quality, AI disruption, management teams, and the behavioral skills that separate great investors from great analysts.

They explore why the edge in investing may increasingly come from judgment, presence, relationships, patience, and the ability to hold the right businesses through uncertainty.

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Topics Covered

• Why being present with management teams may still be an investor edge in the age of AI

• How microcap investing differs from small-cap, mid-cap and large-cap investing

• Why talking to management can build conviction but also create bias

• How Chris Mayer thinks about vertical market software, mission-critical systems and AI disruption

• Why AI may become table stakes rather than a durable competitive advantage

• How small companies can use AI to improve workflows, sales, inventory and productivity

• Why many microcaps have short shelf lives and rarely become true long-term compounders

• The role of intelligent fanatics, owner-operators and repeat winners in great investments

• Why management transitions can create powerful microcap opportunities

• The difference between being a great analyst and being a great investor

• Why execution, position sizing, selling losers and holding winners matter more than hit rate

• How Matt and Bogumil apply the lessons to AI, business quality and the limits of small business scalability

Timestamps

00:49 Introducing Chris Mayer, Ian Cassel and 100 Year Thinkers

04:59 Ian Cassel’s first management meeting and XM Satellite Radio

09:00 Why management meetings deepen understanding but can also mislead

14:32 Chris Mayer on the real edge in long-term investing

18:40 Mission-critical software, systems of record and AI disruption

22:45 How microcap companies are using AI in real businesses

27:02 AI as table stakes and when disruption creates opportunity

31:29 Why most microcaps have short shelf lives35:51 Finding Tom Brady before the market knows he is Tom Brady

40:53 Why owner-operators and intelligent fanatics matter

45:03 Second-in-command leaders, repeat winners and chips on shoulders

49:27 Analyst vs investor and the missing skills of stock picking

54:00 Using data to identify investor strengths, weaknesses and decision errors

58:14 Position sizing and letting small positions earn the right to grow

01:03:00 Peter Lynch, stocks as businesses and learning to think like an owner

01:07:00 AI, human judgment and the limits of automation

01:11:00 Why not every small business can become the next Facebook

01:15:00 Where to follow Bogumil and the 100 Year Thinkers series