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Assets Quote by Charlie Munger

“Black-Scholes works for short-term options, but if it's a long-term option and you think you know something [about the underlying asset], it's insane to use Black-Scholes.” quote by Charlie Munger
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“Black-Scholes works for short-term options, but if it's a long-term option and you think you know something [about the underlying asset], it's insane to use Black-Scholes.”

Charlie Munger

About This Quote

Source Speech: Annual Meeting, Berkshire Hathaway, 2005

Black‑Scholes is unsuitable for long‑term options when you claim insight into the underlying asset; it becomes irrational.

In simple terms: Black‑Scholes fails for long‑term speculative bets.

Key Takeaway

Use appropriate valuation models.

Themes

finance risk valuation

Mood

cautious analytical

Type

financial educational

When to use this quote

  • portfolio management
  • investment strategy
  • risk assessment

Key Concepts

Option pricing model risk long‑term investing

Questions to Reflect On

  • When is Black‑Scholes still useful?
  • How to assess model suitability?
A Different Perspective

It may overlook cases where the model is adjusted for long horizons.

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