How Tim Walz Did Not Know Models Only Say What They’re Told To Say

When I was a manager in an energy trading company, we had frequent meetings discussing the portfolio. Traders had an opportunity to explain their longer positions especially when those looked problematic. I learned one thing right quickly. When the trader came exclusively with models to justify decisions, I knew that he could present no good rationale based on reality for his thinking. I also knew that the trader probably had no clue about what the market really does and how things would likely develop. All they ever knew were numbers and lines on paper. The numbers were wrong almost all the time. Models are evidence for nothing. 

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