Excess Returns Sold At "Irrational Exuberance". Still Lost Money | Sam Ro on the Bubble Paradox
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Jan 10, 2026 Join market commentator Sam Ro, known for his insights on long-term investing, as he shares wisdom on valuations and the impact of AI on the economy. He debates whether traditional valuation tools still hold weight in a market buzzing with tech innovations. Discussing profit margins, he highlights why mean reversion hasn’t materialized post-COVID. Sam raises questions about the potential overbuild in AI capital and warns that bubble timing is notoriously tricky. He emphasizes the lessons from past market exuberance and the importance of framing uncertainty without relying on short-term forecasts.
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AI CapEx Is Big And Hard To Judge Today
- Heavy AI CapEx can be rational for firms chasing long-term dominance, but its ROI is uncertain and often visible only in hindsight.
- Some firms finance buildouts with free cash flow while others risk leverage overreach.
Users Might Capture More AI Value Than Builders
- Value capture may accrue more to AI users than infrastructure builders, mirroring rail/telecom and dot-com patterns.
- Broad economic benefits to many firms (S&P 493) could outweigh winners at the infrastructure layer.
Expect Overbuilds And Write-Downs In AI Infrastructure
- Overbuild risk is real: excess data centers and stranded assets will likely produce write-downs across the industry.
- Historical cycles show builders often suffer losses while users benefit from cheaper infrastructure later.