“THE INVESTOR’S CHIEF problem—even his worst enemy—is likely himself.” So wrote Benjamin Graham, the father of modern investment analysis.
With these words, written in 1949, Graham acknowledged the reality that investors are human. Though he had written an 800-page book on techniques to analyze stocks and bonds, Graham understood that investing is as much about human psychology as it is about numerical analysis.
In the decades since Graham’s passing, an entire field has emerged at the intersection of psychology and finance. Known as behavioral finance, its pioneers include Daniel Kahneman, Amos Tversky and Richard Thaler. Together, they and their peers have identified countless human foibles that interfere with our ability to make good financial decisions. These include hindsight bias, recency bias and overconfidence, among others. On my bookshelf, I have at least as many volumes on behavioral finance as I do on pure financial analysis, so I certainly put stock in these ideas.
At the same time, I think we’re being too hard on ourselves when we lay all of these biases at our feet. We shouldn’t conclude that we’re deficient because we’re so susceptible to biases. Rather, the problem is that finance isn’t a scientific field like math or physics. At best, it’s like chaos theory. Yes, there is some underlying logic, but it’s usually so hard to observe and understand that it might as well be random. The world of personal finance is bedeviled by paradoxes, so no individual—no matter how rational—can always make optimal decisions.
As we plan for our financial future, I think it’s helpful to be cognizant of these paradoxes. While there’s nothing we can do to control or change them, there is great value in being aware of them, so we can approach them with the right tools and the right mindset. Here are just seven of the paradoxes that can bedevil financial decision-making:
How should you respond to these paradoxes? As you plan for your financial future, embrace the concept of “loosely held views.” In other words, make financial plans, but continuously update your views, question your assumptions and rethink your priorities.
Adam M. Grossman’s previous articles include Cut the Bonds, Got You Covered and An Unkind Act. Adam is the founder of Mayport Wealth Management, a fixed-fee financial planning firm in Boston. He’s an advocate of evidence-based investing and is on a mission to lower the cost of investment advice for consumers. Follow Adam on Twitter @AdamMGrossman.