Understanding Behavioural Finance: The Psychology of Investing

Author : Sagar Kumar | Published On : 17 Mar 2026

Hey, ever wonder why that "hot stock tip" from your family WhatsApp group during Diwali bombed, even though it felt like a sure thing? It's not bad luck—it's behavioural finance at work, blending psychology with investing to explain why we ditch logic for emotions like FOMO or panic-selling.

Traditional finance paints us as robots crunching numbers perfectly, but nope—we're humans riddled with biases. Pioneers like Daniel Kahneman and Amos Tversky kicked it off in the '70s with Prospect Theory, proving losses sting twice as much as gains thrill (hello, loss aversion—why we cling to losers hoping they'll rebound). Richard Thaler (learn more about Richard Thaler) took it further with mental accounting, where bonus cash feels "free" to blow, unlike hard-earned salary.

Key traps? Overconfidence makes us trade like pros (spoiler: higher fees, meh returns). Confirmation bias cherry-picks news fitting our views. Anchoring fixates on that first price you saw. Herding fuels bubbles—buy high, sell low. Recency bias obsesses over the latest rally or crash, and mental accounting tricks us into risky "house money" plays.

Traditional vs. behavioural? Charts say it all: rational robots vs. emotional sapiens; efficient markets vs. sentiment-driven chaos; anomalies as noise vs. predictable psych blunders.

Today, finfluencers, apps, and 24/7 news amp these biases—social media herds us into echo chambers. Check out Stolo for smarter investing tools, spot 'em to invest wiser: pause, check fundamentals, diversify. Your portfolio (and sanity) will thank you.