Book "The Hour Between Dog and Wolf": The Biology of Risk and Financial Markets

Author: John Coates

The Idea in a Number

68%! This is the dramatic increase in the hormone "cortisol" (stress hormone) in financial market traders over just two weeks of market fluctuations and number collapses. In contrast, "testosterone" levels surge dramatically during consecutive profit days. This proves in numbers that our financial decisions are not the result of cold mathematical reasoning, but are captive to body chemistry and its hormones that fluctuate with every rise and fall in the charts.

The Big Idea

Financial market bubbles and crashes do not occur only because of bank policies or valuation mistakes, but because of "human biology." This book merges neuroscience and finance to explain how a series of profits transforms investors into reckless gamblers (due to testosterone), while losses transform them into fearful beings who overestimate risk avoidance (due to cortisol), which distorts their rational reading of data.

3 Life Lessons from This Book

  • The Winner Effect: When you achieve a series of successes (whether in investing or work), your body secretes higher levels of testosterone, making you more confident and more willing to take risks. The problem is that this biological confidence can suddenly turn into "illusion of control," pushing you to make catastrophic decisions ignoring numbers and warnings.
  • Intuition Is Not Myth, But Rapid Data Processing: What we call "gut feeling" (Gut Feeling) is not a supernatural thing, but the body's ability (through a network of nerves extending to the stomach and heart) to recognize complex data patterns and risks faster than the conscious mind can analyze them. Listening to your body's signals during stressful times might save you from wrong decisions.
  • Separating Body from Decision: To become a successful decision-maker or accurate data analyst, you must realize when you're under the influence of the "dog" (fear and hesitation due to cortisol) or the "wolf" (recklessness and aggression due to testosterone). Professionals establish strict numerical rules for selling and buying to protect themselves from their biological fluctuations.

Unforgettable Quotes

"We do not have a brain just to think; we have it to move and interact with the physical world; and financial markets are an extension of this physical interaction."

"Economics is not as much a science of rational behavior as it is an extension of evolutionary biology."

Who Is This Book For?

For traders, investors, financial analysts, and every decision-maker who wants to understand the hidden and deep link between their body chemistry, psychological state, and the numbers they see on the screen, to learn how to tame the "wolf" and "dog" within themselves.