The Hour Between Dog and Wolf: How Risk-Taking Transforms Us, Body and Mind

John Coates has written an essential piece for anyone trying to understand the chaos of the trading floor through a lens that isn't just numbers. It’s a vivid, visceral look at how our bodies react when we are in the 'dog' or 'wolf' phase of a trade. Frankly, the way he connects the physiological rush of a win to the crushing weight of a loss feels incredibly authentic to the life of a professional trader. The storytelling is top-notch, pulling you into the high-stakes environment of Goldman Sachs while explaining the chemical soup of our brains. You won’t find a better explanation of why we lose our heads when the market swings wildly. While some might find the heavy focus on hormones a bit dense, it’s exactly what makes the book so fulfilling for those seeking the 'why' behind the 'what'. Highly recommended for its unique perspective and vivid imagery.

The title alone—referring to that twilight hour where you can't tell a friend from a foe—perfectly sets the stage for this brilliant exploration. Coates manages to capture the electricity of the trading floor and ground it in the reality of our physical limitations. I found the arguments about how our bodies literally change during a winning streak to be some of the most fulfilling content I've read in years. It’s a must-read because it challenges the very foundation of modern economic theory. We aren't robots; we are animals driven by ancient survival mechanisms. The prose is sharp, the stories are engaging, and the science, while complex, is presented with a clarity that few academics can manage. It’s one of those rare books that makes you rethink every decision you’ve ever made under pressure.

To be fair, I wasn't sure if a book about biology would really change how I look at the stock market, but I was wrong. Coates has crafted a masterpiece that explains the various drivers behind our worst decision-making processes. The way he describes the 'winner effect'—where success breeds a dangerous level of confidence fueled by testosterone—is chillingly accurate. It’s an entertaining journey through the mind and body of a trader, filled with vivid stories that make the science feel urgent and real. For anyone who has ever felt that 'rush' after a big win and then lost it all on the next play, this book provides the missing pieces of the puzzle. It’s fascinating, well-written, and provides a much-needed reality check for the financial world.

Ever wonder why markets seem to lose their minds every few years? Coates provides a compelling, if occasionally repetitive, argument that our biology is largely to blame for the boom-and-bust cycles. By looking at the spikes in testosterone during bull markets and the crippling levels of cortisol in the crashes, he strips away the myth of the rational economic actor. The truth is, we are biological creatures first and foremost. I found the section on 'irrational exuberance' particularly enlightening because it gives a name to that gut feeling every trader knows. However, I do wish there were more concrete strategies for overcoming these impulses beyond just hiring more women or older men. It’s a fascinating read that bridges the gap between the lab and the trading pit, even if the science feels a bit dated in parts.

Finally got around to reading this and it definitely lived up to the hype regarding its writing quality. Coates has a way of making complex biological processes feel accessible to the layman, which is no small feat. The discussion regarding the 2D:4D finger ratio and its correlation to trading success was absolutely bizarre, yet somehow plausible when you see the data. It makes you look at your own hands in a completely different way! The book does a great job of explaining the 'animal spirits' that Keynes talked about, giving them a physical presence in the body. I’ll admit, the pace drags a bit when he gets deep into the weeds of chemical pathways, but the vivid stories from the trading floor kept me engaged enough to finish. It’s a solid 4-star read for anyone who enjoys behavioral economics and wants to see the physical side of the game.

Picked this up on a recommendation and found it to be a fascinating, if somewhat lopsided, look at risk-taking. Look, the core premise—that our hormones dictate our financial successes and failures—is incredibly strong. Coates writes with the authority of someone who has actually been in the trenches, which makes the trading floor scenes pop with authenticity. I was particularly interested in his suggestions for diversifying trading floors to include more women and older traders to balance out the testosterone-fueled volatility. It’s a sensible solution, even if the implementation seems difficult in the current culture of Wall Street. My only real gripe is that it leans so heavily into the science that the finance side feels like an afterthought at times. Still, it's an entertaining and eye-opening read for anyone interested in the human element of the markets.

The chapter on finger ratios and prenatal testosterone exposure was enough to keep me talking for a week! It’s these kinds of specific, weird details that make the book stand out from your average finance read. Coates does a great job of explaining how our physical bodies are inextricably linked to the ebb and flow of global markets. While the book can get a bit repetitive when he hammers home the testosterone/cortisol cycle, the writing remains high-quality throughout. I especially liked the discussion on how a sunny day can actually impact market performance through our physiology. It’s a bit speculative in parts, sure, but it’s an incredibly thought-provoking look at the 'animal spirits' of the trading floor. Definitely worth a read for the perspective shift alone.

As someone who spent years in the financial industry, I was hoping for more practical takeaways than what was provided here. This book is essentially a Neuroscience 101 course with a thin veneer of finance slapped on top. It’s interesting to learn about the amygdala and the prefrontal cortex, but does that actually help me execute better trades on Monday morning? Probably not. The author’s background as a trader is evident in the anecdotes, which are the best part of the book, but they are far too sparse. Instead, we get long, dry explanations of human anatomy and endocrine systems that feel more like a textbook. Personally, I think a summary of the main points would have been a much better use of my time. It’s not a bad book, but the marketing makes it sound like a risk-management guide when it’s actually a science paper.

Not what I expected based on the jacket description. I was looking for a book on trading psychology and risk management, but this is much more focused on neurobiology. While the author is clearly an expert, the relentless focus on anatomy and hormone levels became a bit dry after the first hundred pages. Gotta say, the anecdotal stories from his time at Goldman Sachs were the highlight, and I wish there had been more of them to break up the technical sections. It’s a good starting point if you’re completely unfamiliar with how the brain processes fear and reward, but for seasoned readers, it might feel like retreading old ground. It's a decent read, but be prepared for a lot of talk about the endocrine system and very little about actual technical analysis.

This was a bit of a slog, to be honest. I went in expecting a deep dive into financial psychology, but what I got was an overly technical lecture on hormones that felt poorly documented in its crazier claims. For instance, the idea that markets crash in October because of seasonal shifts in male testosterone levels is a bit of a reach. Is there a duck nearby? Because I hear a quack. The author uses primitive neuroscience to paint a picture that feels like drawing a mountain with crayons—it’s too simplistic to be truly useful. If you’ve read 'Behave' or any modern neuroscience, this will feel like a step backward. The writing is okay, but the content is just too repetitive and focused on biology over actual market dynamics. I’d rather just re-watch Margin Call if I wanted to feel the tension of a trading room.