Becoming a Better Investor: The Reciprocity Tendency

Charlie Munger, the legendary vice-chairman of Berkshire Hathaway and Warren Buffett’s longtime partner, often highlighted the role of human psychology in shaping our decisions—particularly when it comes to investing. He identified 25 key psychological tendencies that, once understood, can help investors avoid common pitfalls and make smarter choices.

This week, we’re diving into tendency number nine: the Reciprocity Tendency, and looking at how it can influence investment behavior.

What is it?

To sum it up in a sentence, the Reciprocity Tendency is the natural human urge to return a favour. When someone does something nice for us, we feel like we should do/offer something nice back.

Munger says, “The tendency clearly facilitates group cooperation for the benefit of members.” This instinct is deeply rooted in human nature and has been essential for building trust and cooperation within societies. A group or species that learns to cooperate, (like sharing food and shelter and helping protect each other from predators/enemies), has a clear advantage in their environment. Mutual assistance made communities stronger and helped humans survive.

But Munger warns of the flipside of reciprocity, too. When someone does something for us, we naturally feel obligated to do something for them in return… and this can easily be exploited, especially in areas like business and investing. Munger uses the example of car salesmen to highlight how companies often offer small gifts, discounts, or free samples knowing that the recipients (prospective customers) will feel a subtle pressure to “return the favour” by making a purchase.

How does it play out in the world of investing?

In business relationships, someone might offer a small service or tip with the expectation of gaining a future business deal — not because it’s the best deal, but because the other party feels indebted or obligated to return the favour. (For example, a founder or manager might favour a partner or team member who once did them a favour, instead of choosing the best person for the job.)

Reciprocity, in the world of investing, can cloud our judgement. An investor might feel pressured to support a company or fund manager who once gave them a valuable tip or advice, even if that company is no longer a good bet. Or, investors might feel pressured to invest in something just because someone helped them, even if it isn’t a smart choice.

Munger says that when it comes to money matters, we need to ask ourselves if we are doing something because it’s the right/best choice, or because we owe someone. So how do we avoid falling into the reciprocity trap?

• Be cautious: Our investment should always be based on logic, analysis, and long-term goals, not personal feelings of indebtedness. Awareness is key. By simply recognising when you feel a pull to reciprocate, can help you pause and assess whether that feeling is appropriate for the investment or situation. We must also be aware of manipulation.
• Pause before proceeding: No knee-jerk reactions. If you are feeling the pressure to "return the favour,” give yourself time to think. Would you take the same decision if a favour hadn’t been done for you? Don’t rush into decisions just because you feel grateful.
• Focus on the facts: Base your investment decisions on facts, merit, and actual tangible benefits, not emotional obligations.

In other words, reciprocity is a double-edged sword. On the one hand it can create strong, positive relationships, but on the other it can also be used to easily manipulate us. So as investors, we need to remain alert and make investment decisions based on reason and the fundamentals/merit of a company, not the instinct or emotion to reciprocate an action.