If You Get a Big Bet, Make It Really Big
Munger recalls declining an additional investment because it would have required selling other holdings or borrowing. He later judged that reluctance a costly mistake. The example concerns his retrospective assessment, not a risk-free opportunity known in advance.
THE IDEA
Deprival Super-Reaction Tendency
This cognitive bias describes the human tendency to overreact to a potential loss or deprivation, often to the point of making irrational decisions. When faced with a gain that requires some sacrifice (even a trivial one), the mind may amplify the perceived loss, leading to missed opportunities. Charlie Munger's story exemplifies this:
"A friendly broker called and offered me 300 shares ridiculously underpriced, very thinly traded Belridge Oil at $115 per share, which I purchased using cash I had on hand. The next day he offered me 1,500 more shares at the same price, which I declined to buy partly because I could only have made the purchase had I sold something or borrowed the required $173,000."
The account gives the later sale price to Shell as ~$3,700 per share and the additional gain forgone as $5.4 million. It also cites a later estimate of $300–400 million without specifying the valuation date. Munger called the decision "crazy" and a "mistake of omission."
Peter's story of getting into debt with risky stocks and suffering mental anguish further illustrates how deprival super-reaction (fear of losing already invested money) can paralyze decision-making.
The decision question is whether reluctance to rearrange existing commitments is crowding out a sound assessment of an opportunity. That requires examining both the potential return and the costs of funding it.
When to use it
Evaluating an investment by comparing its expected return and risks with the costs of selling other holdings or borrowing, rather than treating reluctance itself as decisive.
Negotiating contracts: If a client offers a very favorable deal but with a modest upfront cost, recognize the tendency to focus on the immediate outlay rather than the long-term gain.
Career decisions: When offered a low-risk career change with higher potential, don't let the comfort of the status quo (loss of stability) override the clear upside.
Reviewing whether delay on a business opportunity reflects an unresolved question or discomfort with making the necessary commitment.
FROM THEORY TO EVERYDAY LIFE
In practice
Charlie Munger's Belridge Oil Missed Opportunity
Munger bought 300 shares of Belridge Oil at $115 each. The next day, a broker offered him 1,500 more shares at the same price. Munger declined because he would have had to sell something or borrow $173,000, a funding step he later believed he should have taken. Belridge later sold to Shell at ~$3,700 per share, making the declined purchase valuable in hindsight. He called it a costly mistake driven by 'deprival super-reaction tendency.'
Peter's Debt and Risky Stocks
Peter describes being in debt from leveraged risky stocks, hoping they would rise. He suffered mental anguish, shame, and pressure, feeling that physical injury would be preferable. He isolated himself and became mad at his own decisions, illustrating how deprival super-reaction (fear of loss) can lead to poor choices and emotional pain.
A MOMENT TO REFLECT
Put it to work.
When have you passed on an opportunity because it required changing existing commitments? Was that a reasonable constraint or a reluctance worth reconsidering?
If you had no constraints (financial, time, etc.), would you make the same choice? How can you separate irrational loss aversion from legitimate risk?
Think of a situation where you 'doubled down' on a losing bet due to the sunk cost fallacy. How is that similar to or different from deprival super-reaction?
CONTINUE THE CONVERSATION
Source texts
- The Art of Being Rational Charlie Munger