Why Every Failed Stock Tip Felt "Obvious" Later: Hindsight Bias | Behavioural Finance M2 Ep 5

"You did not see it coming. Your memory just thinks you did." Ever looked back at a stock crash — YES Bank, PayTM, a small-cap correction — and thought "I always had a bad feeling about that one"? Your brain is being far less honest with you than it seems. This episode breaks down Hindsight Bias: the quiet, automatic tendency to rewrite the past once you already know how it ended, and why that rewrite is one of the most damaging things an investor's memory can do to them. In this video, you'll learn: → Why the past always looks more "predictable" in hindsight than it genuinely was at the time → How the YES Bank collapse of 2020 is a textbook case of warnings that only look obvious after the fact → Why market commentary before the 2025 small-cap correction tells a very different story than the commentary after it → How to tell the difference between "I was right" and "I had a sound process" — and why conflating them is costly → How a simple decision journal can catch hindsight bias before it distorts what you actually learn from a trade This is Episode 5 of a 10-part Module on Cognitive Biases — part of a larger multi-module Behavioural Finance series for Indian retail investors keen on understanding reasons they make money mistakes, not just what mistakes to avoid. Chapters: 0:13 — The PayTM IPO everyone "saw coming" 1:11 — What is Hindsight Bias? 2:43 — Example: The YES Bank collapse 3:54 — Example: The 2025 small-cap correction 5:01 — Four ways to counter Hindsight Bias 7:18 — Closing thoughts Quick facts (for the record): 1. Hindsight Bias was first documented by psychologist Baruch Fischhoff in the 1970s. 2. The PayTM IPO (November 2021) was oversubscribed 1.89 times, yet the stock fell 27.4% on listing day and lost over 70% of its value by 2024. 3. YES Bank's loan book grew at over 30% CAGR between 2010 and 2017, and its stock had risen more than 15 times from its IPO price, before its 2020 collapse. 4. The BSE Smallcap Index fell roughly 23% from its September 2024 peak during the 2025 correction. Frequently asked: Q. What is hindsight bias in investing? A. Hindsight bias is the tendency to believe, after an outcome is known, that you predicted or could have predicted it — even when the situation was genuinely uncertain at the time. In investing, it makes past market events look far more foreseeable than they were, which distorts how investors learn from their own decisions. Q. Why did the Paytm IPO crash even though it was heavily oversubscribed? A. The IPO was oversubscribed 1.89 times with backing from major global investors, yet the stock fell 27.4% on listing day and lost more than 70% of its value by 2024. This shows that strong market enthusiasm at the time doesn't rule out a poor outcome — and it's easy to later recast that outcome as something that should have been obvious. Q. How can investors reduce hindsight bias? A. One effective method is keeping a decision journal — writing down your reasoning, confidence level, and specific uncertainties before an outcome is known, then honestly comparing that record to what actually happened. This creates an accurate account instead of relying on memory, which tends to edit the past. Q. Is hindsight bias the same as overconfidence? A. They're related but different. Overconfidence is excessive certainty about a future outcome. Hindsight bias operates in retrospect — it distorts how confident you believe you were about a past event, after you already know how it turned out. Previously in Module 2: Confirmation Bias — Why You're Not Researching Your Investment, You're Building a Case for It    • Why You Ignore Red Flags In Your Portfolio...   Next in Module 2: Self-Attribution Bias — Taking Credit for Luck and Blaming the Market for Failure    • Why You Blame FIIs, Not Yourself: Self-Att...   📚 Module 2 Playlist:    • Behavioural Finance Course: Investor Psych...   📚 Module 1 Playlist:    • Behavioural Finance Course: Investor Psych...   Disclaimer: Content published here is for general information and educational purposes only and does not constitute an investment advice, a research report, or a solicitation to buy or sell any product. It does not consider the financial situation, objectives or risk profile of any particular person. Past performance and market movements referenced are for illustrative purposes only. Past performance is not indicative of future returns. Investments in the securities market are subject to market risks. Please read all the related documents carefully before investing. #BehaviouralFinance #InvestingPsychology #HindsightBias #YESbank #PaytmIPO