Pillar 10

Behavioral Finance

Personal finance isn't really about money. It's about behaviour. Decades of behavioural-economics research from Daniel Kahneman, Amos Tversky, Richard Thaler, and others have documented the systematic biases and mental shortcuts that drive financial decisions. This section explains those concepts in plain English: loss aversion, sunk cost fallacy, anchoring, mental accounting, the latte factor, lifestyle inflation, FOMO investing, and more. Knowing what these biases are doesn't make them disappear, but it does make them easier to catch.

9 articles

A crowd of investors all moving in the same direction toward a cliff while a single contrarian figure stands still, illustrating how herd mentality leads collective investment decisions toward predictable failures

Psychology What Is Herd Mentality in Investing: Why 'Everyone Is Doing It' Reliably Produces Bad Outcomes

What is herd mentality in investing? The pattern of following the investment decisions of others rather than independent analysis, driven by social conformity, information cascades, and reputational concerns. Covers the Asch conformity experiments (1951), Banerjee's information cascade model (1992), Shiller's research on herd-driven bubbles, the difference between herd mentality and FOMO, and the structural defences that work.

9 min read

A split image showing a person reaching for an immediate small reward while ignoring a larger delayed reward on one side, and clutching an ordinary mug as if it were valuable on the other, illustrating hyperbolic discounting and the endowment effect

Psychology Hyperbolic Discounting vs Endowment Effect: Two Biases That Quietly Distort How You Value Time and Ownership

What is hyperbolic discounting vs the endowment effect? Two advanced behavioural-finance biases, hyperbolic discounting (the asymmetric preference for immediate rewards over delayed ones) and the endowment effect (overvaluing things you already own). Covers Laibson's 1997 hyperbolic discounting research, the Kahneman-Knetsch-Thaler 1990 mug experiment, the retirement-saving problem, the future-self continuity research, and the structural mitigations that work for each.

10 min read

A diagram of eight interconnected cognitive biases surrounding a central decision-maker, illustrating how behavioural finance documents the systematic deviations from rational economic decision-making

Psychology Behavioral Finance Explained: The Psychology Behind Money Decisions

What is behavioural finance? A comprehensive introduction to the systematic cognitive biases that drive financial decisions, loss aversion, sunk cost fallacy, anchoring, mental accounting, hyperbolic discounting, the endowment effect, FOMO investing, and herd mentality. Covers the foundational research from Kahneman, Tversky, Thaler, and Shiller, why awareness alone doesn't fix bias, and the structural mitigations that actually work.

12 min read

A trader chasing a rocket-shaped asset that has already passed its peak, with other investors visible cashing out at the top, illustrating the late-entry pattern of FOMO investing

Psychology FOMO in Trading & Investing: Signs and How to Avoid It

FOMO in trading is buying because others are profiting. The warning signs, real examples (GameStop, crypto, hyped IPOs, India F&O), and how to avoid FOMO trades.

14 min read

Multiple labelled jars holding identical coins, illustrating how mental accounting treats functionally identical money differently based on which mental bucket it sits in

Psychology Mental Accounting: Definition, Examples & How to Beat It

Mental accounting is why a bonus feels different from salary, though every rupee spends the same. Real examples, the investing trap, and how to beat it.

12 min read

A boat anchored to a numeric '100' sitting at the bottom of the sea while smaller estimates float nearby, illustrating how the first number encountered anchors subsequent judgements

Psychology Anchoring Bias: Examples, Studies, and Your Money

Anchoring bias is leaning too hard on the first number you see. Classic experiments, real ₹ and $ examples in pricing, salary and investing, and how to reduce it.

15 min read

A figure standing in front of two doors, one labelled 'continue because you've already paid' and the other 'walk away', illustrating how the sunk cost fallacy biases decisions toward continuing failed commitments

Psychology Sunk Cost Fallacy: Definition, Examples & How to Avoid It

A sunk cost is what you already spent and cannot recover; the sunk cost fallacy is continuing only because of it. Examples from the Concorde to a losing stock, and how to avoid it.

13 min read

A coffee cup beside a house upgrade in scale comparison, illustrating how lifestyle inflation on fixed expenses dwarfs the latte factor on small discretionary spending

Psychology Lifestyle Creep & the Latte Factor: What They Cost

Lifestyle creep is spending that rises to match income; the latte factor is small daily spends compounding. The honest math, the critique, and ₹ and $ examples.

15 min read

Tilted balance scale with a red losing weight outweighing a green gaining weight despite both being the same size, illustrating how loss aversion makes losses feel heavier than equivalent gains

Psychology Loss Aversion: What It Is, Examples & Investing Impact

Loss aversion is feeling losses about twice as intensely as equal gains. The 2.25 ratio, examples, loss vs risk aversion, and how it quietly hurts returns.

14 min read