Despite the mountain of evidence against it, day trading is thriving. Today we dive into the research and explore why the practice is alive and well before answering the question — “Can too much confidence lose you money?” After touching on investing news, listener feedback, our books of the week, and our take on the ‘Ultimate Ned Debate,’ we open our discussion on day trading. In our conversation, we look at the results of numerous papers on the topic, none of which present-day trading as sound financial practice. We shed light on the reasons that people day trade, the performance differences between traders, what a day trader’s learning process looks like, stock-picking strategies, and why it’s impossible, except in outlier cases, to earn a living as a day trader. As we unpack the literature, we discuss key insights on the impact of day trading on the financial world. From one investing sin to another, we talk about how overconfidence can harm your investment performance. We balance the positives and negatives of having confidence, highlighting how too much confidence can lead to poor decision-making and a false sense of how much you know. Tune in to hear some of the latest investing news and to learn more about the pitfalls of day trading and overconfidence. Key Points From This Episode: 21: 56 Introducing today’s portfolio planning topics – day trading and overconfidence. 30:39 Attributing a portion of all portfolio return losses to the effects of day trading. 39: 50 Applying Michael Mauboussin’s ‘Paradox of Skill’ to day trading. 50:25 Why overconfidence can turn you into your worst enemy. 1:01:24 Hear this week’s bad advice of the week; ignore the data and only invest in excellent companies. Books From Today’s Episode: Technological Revolutions and Financial Capital on Amazon — https://amzn.to/3m8Xiqy Start with Why on Amazon — https://amzn.to/37wO5Ef Links From Today’s Episode: Rational Reminder on iTunes — https://itunes.apple.com/ca/podcast/the-rational-reminder-podcast/id1426530582. Rational Reminder Website — https://rationalreminder.ca/podcast/121 Rational Reminder Merchandise — https://shop.rationalreminder.ca/ Common Sense Investing on YouTube — https://www.youtube.com/channel/UCDXTQ8nWmx_EhZ2v-kp7QxA Rational Reminder Community Discussion — https://community.rationalreminder.ca/ ‘How Great Leaders Inspire Action’ — https://www.youtube.com/watch?v=qp0HIF3SfI4 ‘Trading is Hazardous to Your Wealth’ — https://papers.ssrn.com/sol3/papers.cfm?abstract_id=219228 ‘Just How Much Do Individual Investors Lose by Trading?’ — https://faculty.haas.berkeley.edu/odean/Papers%20current%20versions/JustHowMuchDoIndividualInvestorsLose_RFS_2009.pdf ‘The Cross-Section of Speculator Skill: Evidence from Day Trading’ — https://www.researchgate.net/publication/228289143_The_Cross-Section_of_Speculator_Skill_Evidence_from_Day_Trading ‘Day Trading for a Living?’ — https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3423101 ‘Alpha and the Paradox of Skill’ — https://research-doc.credit-suisse.com/docView?language=ENG&format=PDF&source_id=em&document_id=805456950&serialid=LsvBuE4wt3XNGE0V%2B3ec251NK9soTQqcMVQ9q2QuF2I%3D ‘Is Too Much Confidence in Your Investing Knowledge Harmful to Your Investing Performance?’ ‘Investor confidence: Are you your own worst enemy?’ — https://onlinelibrary.wiley.com/doi/full/10.1002/cfp2.1092