Vesa Puttonen's new book reveals: The investment traps that are eating your returns – and how to sidestep the most common mistakes
Professor of Finance at Aalto University, Vesa Puttonen, has done it again. He has published a new work that holds a mirror up to every investor. The book is called "Navigating the Investment Minefield: A Practical Guide to Avoiding Mistakes, Biases, and Traps", and it reads like a survival guide for the minefield of financial markets – a place where, at some point, we all put a foot wrong.
There's an old saying in the business: the market is driven by two emotions, fear and greed. But Puttonen doesn't stop there; he delves deeper into the labyrinth of the human mind. According to him, most investment mistakes don't stem from a lack of information, but from how we process it. It's about psychology.
The three biggest traps investors fall into
I've gone through the key lessons from Puttonen's book, and they boil down to a few recurring themes. He doesn't point fingers; instead, he opens your eyes to how our own brains can let us down, especially when money is on the line. Here they are – the traps we've all likely fallen into at some point:
- Home bias. We prefer to invest in familiar companies, even when the world is full of opportunities. A local investor might hold onto a struggling domestic stock, even when analysts are warning against it. Familiarity feels safe, but it eats into your returns.
- Anchoring. Remember the price you paid for a share? That's now your anchor. Even if the company's future looks bleak, you cling to that purchase price and refuse to sell at a loss. Puttonen reminds us that past prices are irrelevant – it's only the future that counts.
- Overconfidence. After a few successful trades, we start to think we're geniuses. This leads to taking on more risk and forgetting about diversification. And then the day comes when the market reminds you who's really in charge.
However, Puttonen's book isn't just a catalogue of problems. Above all, it's a practical guide on how to dodge these psychological landmines. For example, he advises keeping an investment diary: jot down why you bought a stock, and revisit it a year later. It will ruthlessly reveal whether your decision was based on analysis or emotion.
The book's release has sparked conversation in financial circles. One portfolio manager privately noted that this book should be mandatory reading in every introductory economics course. Another, a long-time investor, commented that he could have avoided tens of thousands in losses if he had read this twenty years ago.
"Navigating the Investment Minefield" isn't your typical investment guide telling you where to put your money. It's far more valuable: it tells you where not to put your money and, more importantly, why we so often make the wrong choices. In the end, it's about the fact that an investor's worst enemy isn't market volatility or even high inflation – it's the person staring back at you in the mirror.