Annie Duke, the former World Series of Poker Tournament of Champions winner and author of Thinking in Bets and Quit: The Power of Knowing When to Walk Away, said investors often make costly mistakes by confusing lucky outcomes with strong investing decisions during speculative market rallies.
Speaking in an interview with MarketWatch published Tuesday, the poker pro turned investing coach outlined a three-step framework for evaluating markets that appear overheated. She said investors should first study historical market behavior, then ask whether current conditions are genuinely different from prior cycles, and finally prepare in advance for the possibility that their investment thesis may be wrong.
“The starting point is what I call the base rate,” Duke said, referring to how similar market environments behaved historically. She said investors should examine whether valuations, momentum and investor behavior resemble periods that previously ended in corrections or bubbles.
Duke used Amazon during the 1999 dot-com era as an example of a company that appeared overvalued at the time but ultimately justified higher valuations because its business model differed significantly from traditional retailers.
She also advised investors to imagine scenarios where their investment thesis fails and identify warning signs early rather than becoming emotionally attached …
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