Peter Brooks is a leading figure in behavioural finance, known for bridging the gap between rigorous academic theory and the practical world of wealth management. His work explores the "human element" of economics—why we make the choices we do, how we perceive risk, and how financial institutions can better support real-world investors.

His academic contribution is built on three main pillars:

1. The Psychology of Loss

In his early work, Peter focused on Loss Aversion—the idea that the pain of losing $100 is much greater than the joy of gaining $100. Collaborating with Horst Zank, he developed new ways to measure this behavior without needing complex mathematical models. His research highlighted that loss aversion isn't a "one size fits all" trait; it varies significantly between individuals and is influenced by factors like gender and personal experience.

2. Do We Know What We Want?

Working with Andrea Isoni, Graham Loomes and Robert Sugden, Peter tackled a fundamental question: Do markets help us "discover" our true preferences, or do they actually "create" them? His research showed that people often "anchor" their values based on the prices they see in the market. This suggests that our financial "wants" are often shaped by the environment we are in, rather than being fixed inside us.

3. Risk as a Personality Trait

Peter’s most practical impact has been in redefining Risk Tolerance. Alongside Greg B. Davies, he argues that a person’s willingness to take risks is a stable personality trait, much like being an introvert or an extrovert. He has been a vocal critic of "goal-based" risk assessments that change whenever the market gets bumpy, arguing instead for a holistic approach that focuses on an investor's long-term psychological profile.

Key Academic Impact

Industry Influence: As the former Head of Behavioral Finance at Barclays, Peter transitioned these theories into tools used by thousands of investors to help them stay calm during market volatility.

Scientific Rigour: His papers are frequently cited by decision theorists to explain the "certainty effect" and the nuances of Prospect Theory.

Methodological Gold Standard: His experimental designs are often used as benchmarks for how to test human behavior in a laboratory setting.

Selected Publications

Brooks, P., & Zank, H. (2005). Loss Averse Behavior. Journal of Risk and Uncertainty, 31(3), 301–325.

Brooks, P., Peters, S., & Zank, H. (2014). Risk behavior for gain, loss, and mixed prospects. Theory and Decision, 77(2), 153–182.

Isoni, A., Brooks, P., Loomes, G., & Sugden, R. (2016). Do markets reveal preferences or shape them? Journal of Economic Behavior & Organization, 122, 1–16.

Davies, G. B., & Brooks, P. (2014). Risk tolerance: Essential, behavioural and misunderstood. Journal of Risk Management in Financial Institutions, 7(2), 110–113.