Investing Psychology by Tim Richards: Why Your Brain Is Bad With Money

I just finished reading “Investing Psychology: The Effects of Behavioral Finance on Investment Choice and Bias” by Tim Richards. And I need to talk about it.

This book messed with my head. In a good way.

Here’s the thing. Most of us think we’re pretty rational with money. We read the news, we check the numbers, we make “smart” decisions. But Tim Richards, who’s been writing about behavioral finance for years on his blog The Psy-Fi Blog, shows that we’re basically running around with a brain that evolved to dodge predators, not pick stocks.

What This Book Is About

Richards breaks down decades of academic research on behavioral finance into something you can actually understand. No PhD required. The book covers how our senses trick us, how our ego gets in the way, how social pressure messes with our portfolio, and why even the “experts” aren’t immune to bias.

The ISBN is 978-1-118-72219-0, published by Wiley in 2014. But the lessons are timeless because human brains haven’t changed much since 2014. Or since 2000 BC, honestly.

Why I’m Doing This Series

I’m going to retell this book chapter by chapter. Not a dry summary. More like “here’s what I learned and why it matters for your wallet.”

The book has 9 chapters:

1. Sensory Finance - How your senses literally fool you about money
2. Self-Image and Self-Worth - Why overconfidence is your portfolio’s worst enemy
3. Situational Finance - How your environment changes your financial decisions
4. Social Finance - Herd behavior, groupthink, and why we follow the crowd
5. Professional Bias - Why the experts aren’t much better than you
6. Debiasing - How to actually fight back against your own brain
7. Good Enough Investing - A practical framework that works
8. A Few Myths More - Common money beliefs that are just wrong
9. The Final Roundup - Key takeaways you can use right now

Who Should Care

If you invest any money at all, even just a 401(k) or some index funds, this stuff matters. Richards makes a strong point early on: we’re increasingly left to make our own financial decisions, but nobody taught us how our brains sabotage those decisions.

The financial industry is basically a machine designed to separate you from your money. And it uses your own psychological biases to do it. Knowing about these biases won’t make you immune. But it gives you a fighting chance.

What to Expect

Each post will cover one chapter (or half a chapter if it’s a big one). I’ll pull out the key ideas, explain them in plain language, and share what I think about them.

No jargon. No pretending I’m a finance professor. Just honest takes on a really good book.

Let’s get into it. First up: how your senses trick you into bad money decisions.